Lost Sea, America's Largest Underground Lake

Explore Sweetwater, TN

The Lost Sea

Visit Our Site

Take a boat ride on the Lost Sea, a unique natural wonder which is listed as “America’s Largest Underground Lake” in the Guinness Book of World Records. Lost Sea has been designated a Registered Natural Landmark by the U.S. Dept. of Interior.

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Visit our site
The Lost Sea, America's Largest Underground Lake
Cascades one of our prettiest formations in the cave
Veil Of Tears Formation
Entrance to the cave
The Lost Sea Glassblower has an amazing display of glass.
Enjoy our gem mine and pan for some awesome gemstones
Try one of our off the beaten path Wild Cave Tours.
The Lost Sea

140 Lost Sea Rd.
Sweetwater, TN 37874

Contact
thelostsea@gmail.com
423-337-6616
Hours
Hours Vary see website.
Visit Our Site

For the most up-to-date hours and information, please contact The Lost Sea directly.

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Nearby Attractions

Still exploring? Try these popular ideas in and around Sweetwater.

Places to Stay

Hotels, Inns & Resorts

Rodeway Inn

Get great value on the road in Sweetwater, TN by staying at our pet-friendly Rodeway Inn® hotel

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Hotels, Inns & Resorts

Rodeway Inn Sweetwater

Hotels, Inns & Resorts

Hilltop Hotel & Conference Center

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Things to Do

Sweetwater Main Street
Shopping

Sweetwater Main Street

Come visit the Sweetest Street in Tennessee! Sweetwater Main Street.

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Sweetwater TN Virtual Tour
Shopping

Sweetwater Tennessee Virtual Tour

Take Our Virtual Tour!

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Proud members of Farmer Veteran Coalition
Farms & Orchards

WEE

Small family farm with a USDA certified kitchen, sawmill and woodshop, two boys, a grandma, and our dog Tater.

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