Season 9 Episodes22
Cast1

Kasper Michaels
Narrator (voice)
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Ranked #19 of 22 in Season 9•−0.2 vs season avg
A forgotten military fortification lies hidden in the Rock of Gibraltar.

Kasper Michaels
Narrator (voice)
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"Hidden Tunnels of Gibraltar" is episode 14 of Mysteries of the Abandoned season 9. It scored 6.3/10 from 13 votes, ranking #19 of 22 episodes this season (season average 6.5). It aired on June 9, 2022.