Have you ever heard of the Lost Sea? It’s the largest underground body of water in the United States – and ranks worldwide – located right here in Tennessee. Visit old Sweetwater for a tour of one of the most mysterious and stunning places our southern state has to offer – including a glass-bottomed boat tour. What?! Yes. Yes, it’s true – let’s go!
Once you show up to the Lost Sea, you'll want to purchase a ticket to one of their daily tours. There are group rates available for folks that number over fifteen, and you're looking at $19.95 per adult and $10.95 per child between the ages of four and twelve. If they're younger, they visit for free!
The tour first begins with a guided walk through the caverns. At roughly three quarters of a mile, you'll enjoy the quirky beauty of the underground cave system, twisting and turning down sloping pathways.
You'll learn about the rock formations that adorn the cavernous main "room," and come to understand the whole of the Lost Sea's wide and illustrious history.
Climb aboard! Once you reach the end of your land tour, you'll jump (well. maybe not 'jump'...) into one of their glass-bottomed boats and take a beautiful jaunt across the four-acre underground lake.
This shot may look a bit blurry, but it's rough taking pictures in the dark! You can see how neat the water looks as it's lit up, and the little bitty boat in the distance.
U.S. Department of the interior recognizes the lake as a Registered National Natural Landmark. At 140 feet below sea level, you'll have a hike getting back up - but it's worth it. You can take in the wonder of "cave flowers," the anthodites of the deep, as well as the strangely peaceful lake.
Visit for yourself at 140 Lost Sea Road, just seven miles outside of Sweetwater, Tennessee. Then report back to us and tell us how fun it was! You can't beat a glass-bottomed boat tour, y'all - you just can't.