Susan C.
7/4/2025
Took a guest visiting from Germany to The Lost Sea on the outskirts of Sweetwater, TN. Our young witty guide, Noah, led a large group of us through Craighead Caverns, with its stalactites and...
The Lost Sea
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140 Lost Sea Rd
Sweetwater, TN 37874
The Lost Sea, located in Sweetwater, Tennessee, is home to America's largest underground lake, discovered only a few decades ago. Visitors can embark on a guided tour of the historic Craighead Caverns, culminating in a scenic boat ride on the expansive subterranean lake while learning about its rich history, including its use by Cherokee Indians and Confederate soldiers.
The site features a newly renovated entrance facility with updated amenities, enhancing the visitor experience. The Lost Sea is a Registered National Landmark and a prominent member of the Southern Highlands Attractions, dedicated to preserving the natural beauty and history of this remarkable destination.
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Reviews
4.5225 reviews
Diane W.
11/10/2025
My husband and I adventured to this place while on a camping trip. We did one of the late afternoon time slots and booked/paid online. We didn't have any issues booking or finding parking. The...
Nash W.
5/14/2025
The Lost Sea is misleading but it's a decent stop to check things out. Quite a hike in the cave up and down a pretty good clip. The sea is basically a very small lake... Kind of like a below...
Sherry L.
10/25/2025
Tour guides are immature and unprofessional "kids" that enjoy shining their flashlights on each other during the guests tour and "mucking" it up with each other. They recite memorized tutorial of...
Sally H.
9/19/2024
The Lost Sea is America's largest underground lake and Registered National Landmark located in beautiful Sweetwater, Tennessee. The visible portion of the lake is 800 feet long by 220 feet...
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