Hurricane Helene Updates: Learn More

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.

Read MoreLess
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.

Click to Interact

Get Driving Directions

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

Read More
Hotels, Inns & Resorts

Rodeway Inn Sweetwater

Hotels, Inns & Resorts

Hilltop Hotel & Conference Center

See more

Things to Do

Sweetwater Main Street
Shopping

Sweetwater Main Street

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

Read More
Sweetwater TN Virtual Tour
Shopping

Sweetwater Tennessee Virtual Tour

Take Our Virtual Tour!

Read More
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.

Read More
See more

Related Articles

For more info on The Lost Sea or things to do in the area, check out these articles.

Foster Falls at South Cumberland State Park in Marion, TN
9 Tennessee Adventures Before Heading Back to School
Read Now
Boating on Norris Lake in Tennessee
Your Guide to Water Activities in Tennessee
Read Now
Aerial view of Leiper's Fork in Franklin
Tennessee's Hidden Gems In & Out of Big Cities
Read Now
Willow, the keeper of the forest, at Anakeesta in Gatlinburg
12 Whimsical Places to Visit in Tennessee
Read Now
A person in a canoe at Meeman Shelby State Park in Memphis
Go Outdoors in Tennessee
Read Now
Cool off in Tennessee
Caves, Lakes, Rivers and Waterfalls: Cool off in Tennessee
Read Now
Great Smoky Mountains hiking in Tennessee
Tennessee Outdoor Adventures Guaranteed to Get Your Blood Pumping
Read Now
Foothills Parkway in the Smokies
Five East Tennessee Fall Foliage Photo-Ops
Read Now
Fall foliage in Tennessee
Plan Your Fall Foliage Journey on Tennessee's Beautiful Byways
Read Now