The Lost Sea Adventure

140 Lost Sea Rd, Sweetwater, TN 37874, USA

About The Lost Sea Adventure

    The Lost Sea is America’s largest underground lake and Registered National Landmark located in beautiful Sweetwater, Tennessee. We are open every day of the year for tours (except Christmas Day). You will love our General Store, Ice Cream Parlor, Gem Mine and Glassblower. Our cafe, the Cavern Kitchen, offers sandwiches and real pit barbecue to hungry visitors. Ample picnic facilities and a nature trail are also available.

    The Lost Sea is also a member of the National Cave Association, which stresses preservation of these glorious natural resources.

    Closed Thanksgiving Day and Christmas Day

    The Lost Sea is located in Sweetwater on Hwy. 68, just seven miles off I-75, exit #60.

    Lost Sea
    140 Lost Sea Road
    Sweetwater, TN 37874
    (423) 333-2289

    The Lost Sea Adventure

    Our Address

    140 Lost Sea Rd, Sweetwater, TN 37874, USA

    Visit Us at The Lost Sea!

    Your Lost Sea adventure begins with a guided tour of the caverns. This  involves a ¾ mile round-trip walk on wide sloping pathways. While  touring the caverns and underground lake our guides will tell of the  cavern’s exciting and colorful history. They will also explain the  fascinating geological development of the immense cavern rooms and rare formations.   At the bottom of the cave you will board a glass-bottom boat for an  exciting trip on the Lost Sea, America’s Largest underground lake.

    Group rates available for groups of 25 or more:

    Click Here Educational rates for school groups of 15 or more:

    Click Here Flashlight Tour Rates for groups of 25 or more:

    Click Here Wild Cave Tour Hours & Rates:

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