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Lost Sea Adventure

140 Lost Sea Rd, Sweetwater, TN 37874-6724
+1 423-337-6616
Review Highlights
Wow just wow

This was my first under ground cavern and I was so amazed.The guide took us 140 feet under ground... read more

Reviewed 3 days ago
Debi C
Very cool

Read about this attraction online and decided to make the detour enroute to Knoxille. Happy we did... read more

Reviewed 5 days ago
Vancouver, Canada
Read all 758 reviews
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America's largest underground lake. - Open year-round except Christmas - Cost is $18.95 Per person adults and $9.95 Per person children ages 5-12.
  • Excellent43%
  • Very good36%
  • Average16%
  • Poor4%
  • Terrible1%
Travellers talk about
“boat ride” (211 reviews)
“rainbow trout” (57 reviews)
“glass bottom” (50 reviews)
140 Lost Sea Rd, Sweetwater, TN 37874-6724
+1 423-337-6616
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Reviews (758)
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1 - 10 of 758 reviews

Reviewed 3 days ago

This was my first under ground cavern and I was so amazed.The guide took us 140 feet under ground all through this cavern. It had all kinds of different "rooms" and each "room" had a story. This was the site of an old Indian tribe...More

Thank Debi C
Reviewed 5 days ago

Read about this attraction online and decided to make the detour enroute to Knoxille. Happy we did as it was a neat experience. Nothing fancy or over the top, but a simple set up where guides take tourists down below to experience an extensive underground...More

1  Thank ScreamingBanshee
Reviewed 6 days ago

Had seen signs while traveling area advertising Lost Sea. Thought it was just another roadside attraction. My wife and I decided to to visit since we were in area antique shopping. We arrived early Sunday morning and got the first tour. Well worth the visit....More

2  Thank William C
Reviewed 1 week ago via mobile

Not sure what we were going to see but others had recommended going to Lost Sea. Pleasantly surprised with the wonderful tour of the cave and the knowledge of the guides. Getting to go on a boat ride (short and slow) was an extra bonus....More

1  Thank Debbi A
Reviewed 1 week ago

The 4 of us had a really good time at the Lost Sea! The cavern's were so beautiful on the walk down to the lake. The tour then loaded up on the boat (Thanks Jack for helping an old lady out)the lake was beautiful with...More

Thank R856MAcindym
Reviewed 1 week ago

Very pleasant and informative. I am just enthralled with the beautiful water. I wish we could swim in it!!! Ofcourse it's 58 degrees!

Thank Lynn T
Reviewed 1 week ago

I've been wanting to see this site for years and decided to take an overnight and go. VERY interesting, good tour- well worth the trip for any age! We are both in our 60's and enjoyed the experience.

Thank Kathleen C
Reviewed 2 weeks ago

We were here 35 years ago and it was much better. It had colored lights, white fish in the lake, and the boat ride was longer back then. Now it has a lake at the bottom with boats to go out on with white lights...More

Thank Diane L
Reviewed 2 weeks ago

I haven't been here in years so when I read a few negative reviews I was saddened but still went. There were three in our party, adult tickets are 19.95 and children up to 12 are 10.95, do expect tax on the tickets. Our tour...More

2  Thank mommysbored
Reviewed 3 weeks ago via mobile

Arrived just in time for the last tour of the day. Our family of 5 had a private tour guided by Cody. We had a great time!

1  Thank tkn4lif
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Questions & AnswersAsk a question
Barbara m
How long should I allow for this adventure. Two adults and two boys (7&8 years old)?
20 June 2017|
Answer Show all 10 answers
Response from Lisa M | Property representative |
It really depends on when you are coming and if there will be a wait to get in. Sometimes in the summer and on busy weekends it could take up to an hour or so to get in. The tour takes about an hour and twenty minutes. If... More
Debi B
Do we need reservations or can we just get a ticket when we get there. Not sure what day we will be there
26 May 2017|
Answer Show all 8 answers
Response from Mary m | Reviewed this property |
Sorry for delay in responding! No reservations needed
Yvonne M
What is the temperature in the cave in the month of late February and early march? In the cave.
4 March 2017|
Answer Show all 6 answers
Response from Lisa M | Property representative |
The temperature in the cave is a constant 58 degrees although this is a fairly warm 58 degrees because the humidity in the cave is very high making the temperature seem a little warmer than 58. We hope to see you soon.