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Your Lost Sea adventure includes a ¾ mile round-trip walking tour on wide sloping pathways and a glass-bottom boat ride on The Lost Sea, America’s Largest Underground Lake. Guides share the cavern’s exciting & colorful history and explain the fascinating geological development of the immense cavern rooms and rare formations. Tours daily, year-round. Adult, child & group rates.

140 Lost Sea Rd
Sweetwater, TN 37874-6724
Exit at Milepost 469.1