Secrets of the Underground - Season 1 - Eps 4: Rocky Mountain Monsters
Rob Nelson examines a set of bizarre markings that suggest a violent clash between prehistoric beasts. In California, he investigates if a strange lake is a home to alien life.
About Secrets of the Underground
Title: Secrets of the Underground
First Air Date: 2017-02-14
Last Air Date: 2017-12-16
Status: Returning Series
Rating: 4.3/10 (from 3 votes)
Language: EN
Seasons: 2
Total Episodes: 16
Network: Science
Genres: Reality, Documentary
Production Companies: Science Channel
Synopsis
A search for an underground escape route said to have been used by Al Capone. Also: who or what built earthen mounds in Washington state.
