Adventure Travel Guides in Sweetwater

Explore Lost Sea, America’s largest underground lake tucked beneath Tennessee’s hills. This accessible caving adventure offers a unique glimpse into an ancient subterranean lake, paired with practical tips to help you prepare for the journey beneath the surface.

Discover the vast underground waters of The Lost Sea in Sweetwater, Tennessee—the largest underground lake in the U.S. Guided tours navigate this hidden world beneath the hills, offering an unforgettable adventure that combines natural wonder with accessible exploration.