Expedition Unknown · SEASON 18

Secrets of Mexico's Underworld

Episode 5 · 2026-07-22

★ 6.5
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Expedition Unknown poster
Season 18Episode 5★ 6.5/10
  • Documentary
  • Reality
  • Action & Adventure

Episode overview

Josh joins archeologists as they bushwhack through thick jungles and rappel into vast caves in search of the lost Zoque culture. Deep underground, the team pushes through flooded sections and finds thousands of ritual offerings that may solve the mystery.

42 minutes

Season 18 episodes

1. Hunt for World War II Hellships2026-06-24 2. Finding World War II's Lost Prisoners2026-07-01 3. Death Jars of Laos2026-07-08 4. Sunken City of Pirates2026-07-15 5. Secrets of Mexico's Underworld2026-07-22 6. Inca Treasure Tunnels2026-08-05 7. Chasing Civil War Gold2026-08-12