Season
- Season 0 2015-11-11
- Season 1 2015-01-08
- Season 2 2015-10-07
- Season 3 2016-11-02
- Season 4 2017-12-27
- Season 5 2018-05-29
- Season 6 2018-10-07
- Season 7 2019-04-07
- Season 8 2019-08-08
- Season 9 2020-02-05
- Season 10 2021-07-21
- Season 11 2022-05-25
- Season 12 2023-05-24
- Season 13 2023-11-15
- Season 14 2024-06-20
- Season 15 2024-10-09
- Season 16 2025-06-18
- Season 17 2025-11-05
Season 17 Episode
- Season 2 The Quest for King Arthur
- Season 2 Genghis Khan's Tomb
- Season 2 Blackbeard's Hidden Gold
- Season 2 Hunting Vampires
- Season 2 The Real Robin Hood
- Season 2 Finding Fenn's Fortune
- Season 2 Japan's Atlantis
- Season 2 True Cross of Christ
- Season 2 The Sultan's Heart
- Season 2 Africa's Gold Hoard
- Season 2 Kalahari Desert's Lost City
- Season 2 Yamashita's Gold
- Season 2 Columbus: Legend or Liar?
- Season 2 Searching for Shangri-La
- Season 2 Shangri-La Found
- Season 2 Lost Mexican City
- Season 2 Incan King's Mummy
- Season 2 Nazi Gold Train
- Season 2 Hitler's Atomic Secrets
Expedition Unknown - Season 2 Episode 7 Japan's Atlantis
8.00 48 minutes Gates goes to the ruins of Yonaguni Island, the westernmost Japanese island on the East China Sea, to determine whether the undersea structures are geologic or man-made. The Yonaguni Monument discoverer, Kihachiro Aratake, dives with Josh, showing him the undersea area with cut steps leading up to a level platform. Josh takes a rock sample for geologic analysis. In Osaka, archaeologist Michio Maezano shows Josh an ancient rock tomb. It proves that ancient people could have carved the Yonaguni structures, then an earthquake could have sunk them.
