Ancient Treasures Discovered by Accident (11 Photos)

November 8, 2026

By Vidar

They Were Looking for Something Else

Farmers wanted water. A man in Suffolk wanted a friend’s hammer back. Miners wanted a new tunnel. Each of them hit something that had been underground or underwater for centuries, sometimes far longer, and most of these finds can still be seen today.

More: Hidden for Centuries

🏺 Terracotta Army — Found by Farmers in Lintong, Xi’an, China 🇨🇳

Clay soldiers stand in their trench in Pit 1, with a clay horse in front. On March 29, 1974, a group of farmers digging a well near the Qin emperor’s tomb mound hit the first pieces; today pits 1, 2 and 3 are on view at the Emperor Qinshihuang’s Mausoleum Site Museum.

💡 Clay Fact: More than 7,000 pottery soldiers, horses, chariots and weapons have been dug up so far.

📂 Artwork File · Sourced factsTerracotta ArmyEmperor Qinshihuang’s Mausoleum Site Museum · Lintong, Xi’an, ChinaLintong, Xi’anFound digging a well7,000+ figures (official)1In March 1974 a work brigade of farmers drilling a well near Lintong discovered a subterranean chamber, Britannica says.Britannica2More than 7,000 pottery soldiers, horses, chariots and weapons have been excavated from the pits, by the official count.China Daily government portal1974MarFarmers drilling a well near Lintong discover a subterranean chamber20187 DecOfficial overview counts more than 7,000 excavated figures, horses and chariots (page updated 7 Dec 2018)20248 SepGovernment marks 50 years since the 1974 find202610 SepPeople’s Daily: visitors watch restorers in the Pit No. 1 conservation labRead the full file →

📷 Photo: Gary Todd / Wikimedia Commons (CC0)

💎 Cave of the Crystals — Found by Miners in Naica, Mexico 🇲🇽

The small figure in a helmet at lower right is a person. In 2000 two miners cutting a new tunnel in the Naica mine broke into this cave, about 1,000 feet (300 m) down, where the air is around 136°F (58°C). It was never open to visitors.

💡 Crystal Fact: The cave could only be reached while the mine’s pumps kept the water out. When mining stopped, the pumps were switched off and the cave was allowed to flood again in October 2015.

📂 Artwork File · Sourced factsCave of the CrystalsNaica mine · Chihuahua, MexicoNaica, Mexico300 m undergroundFound April 20001Brothers Juan and Pedro Sánchez broke into the cave in April 2000 while drilling in the Naica mine, where it lies about 300 meters down.Wikipedia2The cave was allowed to re-flood in October 2015; by 2021 it was reported entirely under water.Mexico News Daily2000AprMiners Juan and Pedro Sánchez break into the crystal cave20076 AprNational Geographic reports on research in the 58°C cave201015 AprCrystals photographed (camera date)2015OctPumping stops and the cave is allowed to re-flood20212 AprMexico News Daily: tunnel and cave entirely under waterRead the full file →

📷 Photo: Alexander Van Driessche / Wikimedia Commons (CC BY 3.0)

🏛️ Herculaneum — Found by a Well Digger in Ercolano, Italy 🇮🇹

The Roman town sits in a pit below the houses of modern Ercolano, with Vesuvius behind it. Tradition says a farmer, Ambrogio Nucerino, hit the buried theater while digging a well around 1709; a duke then tunneled in for nine months to take marble statues for his villa.

💡 Ash Fact: The town lay under about 66 feet (20 m) of volcanic material from the eruption of 79 AD.

📂 Artwork File · Sourced factsHerculaneumHerculaneum Archaeological Park · 79 AD · Ercolano, ItalyErcolano, ItalyBuried 79 ADFound digging a well (park)1A farmer digging a well reached the buried theater; Prince d’Elbeuf then dug there for nine months and statues were taken out, the park says.Parco Archeologico di Ercolano2The town lay under about 20 meters of volcanic material from the 79 AD eruption of Vesuvius.Wikipedia1709Traditional account: the city is rediscovered in 1709 during the drilling of a well1738Systematic exploration begins under Charles of Bourbon202616 JulPark announces Martusciello Gallery reopening (from 15 July)Read the full file →

📷 Photo: Falk2 / Wikimedia Commons (CC BY-SA 4.0)

🪨 Rosetta Stone — Found by French Soldiers in Rashid, Egypt 🇪🇬

In July 1799 French soldiers digging foundations for a fort at Rashid (Rosetta) stumbled upon this broken slab. The British took it in 1801, and it now stands in Room 4 of the British Museum in London.

💡 Stone Fact: The text is a decree issued in 196 BC by a congress of priests at Memphis after the coronation of Ptolemy V. Jean-François Champollion announced his transliteration of the Egyptian scripts in Paris in 1822.

📂 Artwork File · Sourced factsRosetta Stone196 BC · British Museum, LondonFound at Rashid, EgyptDecree of 196 BCThree scripts1French soldiers digging foundations for a fort at Rashid, Egypt, found the stone in July 1799, the British Museum says.British Museum2The same decree of 196 BC is written in hieroglyphs, Demotic and Greek, which helped Champollion announce his reading of the Egyptian scripts in 1822.Wikipedia1799JulFrench soldiers dig up the stone at Rashid1802Enters the British Museum1822Champollion announces his reading of the Egyptian scripts200721 NovStone photographed in the British Museum (camera date)202616 JulThe National: on free view in London; campaign for its returnRead the full file →

📷 Photo: Hans Hillewaert / Wikimedia Commons (CC BY-SA 4.0)

🐎 Lascaux — Found by Four Teenagers in Montignac, France 🇫🇷

This is a faithful replica: the original cave closed to the public in 1963. Marcel Ravidat found an opening in the woods on September 8, 1940, and came back with three friends four days later; the popular story says his dog Robot led the way. Visitors now see the copies at Lascaux IV and Lascaux II in Montignac.

💡 Cave Fact: The cave holds nearly 6,000 figures, usually estimated at 17,000 to 22,000 years old.

📂 Artwork File · Sourced factsLascaux CaveMontignac-Lascaux, Dordogne, FranceMontignac, FranceClosed since 1963Four discoverers1The French culture ministry names four young discoverers: Marcel Ravidat, Jacques Marsal, Georges Agniel and Simon Coencas.French Ministry of Culture2The original cave has been closed to the public since 1963; visitors see full-size copies at Lascaux II and Lascaux IV.Wikipedia19408 SepMarcel Ravidat finds the opening in the woods194012 SepRavidat returns with three friends and enters the cave1963Original cave closed to the public202616 FebTourMaG: Lascaux IV marks ten years open (since December 2016)Read the full file →

📷 Photo: HTO / Wikimedia Commons (public domain)

🕳️ Derinkuyu Underground City — Found by a Homeowner in Derinkuyu, Turkey 🇹🇷

Visitors walk through a tunnel cut by hand into soft volcanic rock. In 1963 a resident renovating his house knocked through a basement wall and found a passage behind it. Part of the underground city is open to visitors today.

💡 Depth Fact: It goes about 280 feet (85 m) down, and it was large enough to shelter as many as 20,000 people along with their livestock and food.

📂 Artwork File · Sourced factsDerinkuyu Underground CityDerinkuyu, Nevşehir, TurkeyAbout 85 m deepOpened 19651The museum authority gives Derinkuyu’s depth as about 85 metres.Nevşehir Museum Directorate2Opened to the public in 1965, only about ten percent of it can be visited today.Türkiye Museums1965Opened to visitors20091 AugTunnel photographedRead the full file →

📷 Photo: TobyJ / Wikimedia Commons (CC BY-SA 4.0)

🦣 The Mammoth Site — Found by an Earthmover Operator in Hot Springs, South Dakota, USA 🇺🇸

Tusks and bones lie where they were found, under a roof built over an old sinkhole. In June 1974 George Hanson was grading land for a housing development when his machine turned up bones; his son Dan recognized them. Today the dig is The Mammoth Site museum.

💡 Mammoth Fact: The remains of more than 60 mammoths have been found here, and digging still goes on every July.

📂 Artwork File · Sourced factsThe Mammoth SiteThe Mammoth Site · Hot Springs, South DakotaHot Springs, South DakotaFound June 197461 mammoths so far1In June 1974 George Hanson was leveling ground for a housing development when his machine turned up bones, the site’s history says.The Mammoth Site258 Columbian and three woolly mammoths have been found in the ancient sinkhole so far, Cowboy State Daily reports.Cowboy State Daily1974JunGeorge Hanson’s machine turns up mammoth bones1980Named a US National Natural Landmark200919 AugBones photographed in place (camera date)202613 SepCowboy State Daily reports the sinkhole is older than thoughtRead the full file →

📷 Photo: Jllm06 / Wikimedia Commons (CC BY-SA 4.0)

💰 Hoxne Hoard — Found by a Man Looking for a Hammer in Hoxne, England, UK 🇬🇧

On November 16, 1992, Eric Lawes took the metal detector he got as a retirement gift into a field near Hoxne to look for a farmer friend’s lost hammer. He found Roman gold and silver instead, now shown at the British Museum. He found the hammer too.

💡 Hoard Fact: The hoard holds 14,865 Roman coins and about 200 pieces of silver tableware and gold jewelry. Even the lost hammer is in the British Museum’s collection, though it is not counted as part of the hoard.

📂 Artwork File · Sourced factsHoxne HoardFound near Hoxne, Suffolk · 1992Found near Hoxne, SuffolkFound 16 Nov 1992Late Roman treasure1Eric Lawes found the treasure on 16 November 1992, and archaeologists excavated the rest of it the next day, the Britannia report says.Britannia2According to Wikipedia, it holds 14,865 Roman coins and about 200 items of gold jewelry and silver tableware.Wikipedia199216 NovEric Lawes finds the hoard while looking for a lost hammer199217 NovArchaeologists excavate the rest of the hoard1994NovBritannia paper on the hoard published (Nov 1994)201027 JunHoard display photographed at the British Museum (camera date)20268 NovEarth.com retells the lost-hammer findRead the full file →

📷 Photo: Mike Peel / Wikimedia Commons (CC BY-SA 4.0)

⚙️ Antikythera Mechanism — Found by Sponge Divers off Antikythera, Greece 🇬🇷

Around Easter 1900 sponge divers from Symi stopped at Antikythera to wait for better winds and found an ancient shipwreck. Two years later archaeologist Valerios Stais noticed a gear wheel in a corroded lump from it. The pieces are in the National Archaeological Museum in Athens.

💡 Gear Fact: The device survives in 82 fragments, with 30 of its bronze gears still visible.

📂 Artwork File · Sourced factsAntikythera MechanismNational Archaeological Museum · Athens, GreeceFound off Antikythera82 fragmentsRecovered 19011According to Wikipedia, the fragments were recovered from the wreck in 1901, and archaeologist Valerios Stais spotted a gear in a corroded lump in 1902.Wikipedia2Britannica describes it as an ancient Greek mechanical device that calculated and displayed astronomical information.Britannica1901Pieces recovered from the Antikythera wreck1902Valerios Stais notices a gear in a corroded lump20179 JulFragments photographed in Athens (camera date, from file metadata)202112 MarUCL team publishes a new reconstruction of the cosmos display202620 JulEuronews: the mechanism is kept at the museum in AthensRead the full file →

📷 Photo: Joyofmuseums / Wikimedia Commons (CC BY-SA 4.0)

🦴 Waco Mammoth — Found by Two Arrowhead Hunters in Waco, Texas, USA 🇺🇸

The skull of a female mammoth, labeled “W,” still lies in its original position in the bone bed, under the dig shelter. In spring 1978 Paul Barron and Eddie Bufkin were looking for arrowheads and fossils near the Bosque River when they found a bone. It is now Waco Mammoth National Monument.

💡 Herd Fact: Of at least 24 mammoths identified here, 19 belonged to a nursery herd of females and young that is thought to have died in a single natural disaster more than 65,000 years ago, according to the National Park Service.

📂 Artwork File · Sourced factsWaco Mammoth National MonumentNational Park Service · Waco, TexasWaco, TexasFound 197819-mammoth nursery herd1In 1978 Paul Barron and Eddie Bufkin were looking for arrowheads and fossils near the Bosque River when they found a large bone.National Park Service219 of the mammoths belonged to a nursery herd thought to have died together more than 65,000 years ago.National Park Service1978Barron and Bufkin find a large bone near the Bosque River2009Dig shelter opens over the bone bed201321 AugMammoth W photographed in the dig shelter (camera date)201510 JulBecomes a unit of the National Park System202516 JulKWBU marks ten years as a national siteRead the full file →

📷 Photo: Larry D. Moore / Wikimedia Commons (CC BY 4.0)

🌊 Roman Mosaic — Found by Hotel Builders in Antakya, Turkey 🇹🇷

Conservators work on a Roman floor that ancient earthquakes bent into waves. It turned up when the Asfuroğlu family started building a hotel in Antakya. Instead of dropping the project, they built the hotel above the finds, and the floor is now on view in the Necmi Asfuroğlu Archaeology Museum beneath it.

💡 Mosaic Fact: The single floor covers about 11,300 square feet (1,050 m²), and it came through the February 2023 earthquakes without damage.

📂 Artwork File · Sourced factsRoman floor mosaic at the Necmi Asfuroğlu Archaeology MuseumNecmi Asfuroğlu Archaeology Museum · Antakya, TurkeyAntakya, TurkeyAbout 1,050 square metersFound during hotel work1The single floor mosaic covers about 1,050 square meters and was uncovered during hotel construction in Antakya.Hürriyet Daily News2Ancient earthquakes reportedly bent it into waves; the February 2023 earthquakes left it undamaged, according to the same report.Hürriyet Daily News2010Uncovered during hotel construction in Antakya (2010 per 2026 news)2019MayAnother photo (Lale Köklü) shows the pavement during conservation (caption; published November 2020)202621 MayTürkiye Today: draws visitors after surviving the 2023 earthquakes202622 MayHürriyet Daily News: on display, undamaged by the 2023 earthquakesRead the full file →