Craighead Caverns is a large cave system in Tennessee, located between Sweetwater and Madisonville. The Lost Sea, the largest and second largest non-subglacial subsurface lake in the United States, is its most famous feature.

What is the legend of the vanishing sea?

Ben Sands, a thirteen-year-old kid, discovered the Lost Sea in 1905 after wriggling through a small muddy aperture 300 feet underground and finding himself in a room with a big lake. He flung mudballs into the darkness to see how big it was, but only got splashes in return.

What is the duration of the excursion at the Lost Sea?

You will enjoy a boat trip on The Lost Sea, America's Largest Underground Lake, at the cave's bottom. Tours are available every day of the year (except Thanksgiving and Christmas Day). The tour will last about 1 hour and 15 minutes.

What is the depth of the Lost Sea Adventure?

Because the lake is 140 feet below ground level, getting to it can be a challenge. The tour will run about an hour and fifteen minutes. The temperature is still at a comfortable 58 degrees.