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Lost Sea, America's Largest Underground Lake

Explore Sweetwater, TN

The Lost Sea

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Learn more about 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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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

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

Address

140 Lost Sea Rd.
Sweetwater, TN 37874

Contact

Questions? Please Email
thelostsea@gmail.com
Contact Phone Number
423-337-6616
Fax Number
423-337-0803

Admission Rates

Adults $21.95 Children (4-12) $12.95 children 3 and under free

Hours

Hours
Hours Vary see website.
Dates Closed
Closed Thanksgiving Day
Closed Christmas Day

Payment Methods Accepted

  • Cash
  • Discover
  • Mastercard
  • Visa

Discounts Given

  • Senior Citizen Discount
  • Group Discount
  • Military Discount
  • AAA Discount
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