We noticed that you're using an unsupported browser. The TripAdvisor website may not display properly.We support the following browsers:
Windows: Internet Explorer, Mozilla Firefox, Google Chrome. Mac: Safari.
Review Highlights
Imagine the Original Explorers

The Park has done an excellent job of lighting the caverns with the general light levels being kept... read more

Reviewed 2 weeks ago
A pit 140 feet deep located in the Big Room

The Bottomless Pit is a big hole in the floor of the Big Room. There is a sign along the walkway... read more

Reviewed 3 weeks ago
Austin, Texas
Read all 47 reviews
Map updates are paused. Zoom in to see updated info.
Reset zoom
Updating Map...
Pit in Carlsbad Caverns that looks "bottomless" but is actually 140-feet deep.
  • Excellent40%
  • Very good29%
  • Average25%
  • Poor6%
  • Terrible0%
Travellers talk about
“black hole” (2 reviews)
“big room” (15 reviews)
“abyss” (2 reviews)
Carlsbad Caverns National Park, NM
Write a Review
Reviews (47)
Traveller rating
Traveller type
Time of year

1 - 10 of 46 reviews

Reviewed 2 weeks ago

The Park has done an excellent job of lighting the caverns with the general light levels being kept slightly subdued to maintain the atmosphere of being deep underground but specific highlights being carefully lit to bring out the best. However, think back to the original...More

Thank Highlander022
Reviewed 3 weeks ago

The Bottomless Pit is a big hole in the floor of the Big Room. There is a sign along the walkway that points out the Bottomless Pit. The pit is 140 feet deep.

Thank M J
Reviewed 4 weeks ago

you can see this on self guided tour in The Big Room-- there is information for you to read- also on the audio guide-

Thank barbiewalker72
Reviewed 6 July 2017

The Bottomless Pit is interesting by itself, but is overshadowed by the Spectacular Big Room in which it is located. The Bottomless Pit (really 140 feet deep with a soft dirt floor if I remember correctly), is one of hundreds of things to see in...More

Thank Gabe10101
Reviewed 1 July 2017

Told our 9 year old granddaughter we were going to throw her in. Not really bottomless, but so dark down there that it looks like it is. Actually 140 Ft deep. Along the trail around the Big Room.

Thank csarchibald
Reviewed 28 May 2017 via mobile

Available to cavern visitors on the self-guided Big Room Tour, this is at the middle of the walking tour and furthest from your starting point. This formation is unlike many others in the cavern, in that it appears as "just a hole". Remembering how the...More

Thank LSUTraveller
Reviewed 13 May 2017

Another one of the amazing things to see in the Big Room at Carlsbad Caverns! If you keep it in the proper historical perspective this is an amazing thing, also in low light it is very believable as it is described.

Thank bcreff
Reviewed 30 April 2017

We saw The Bottomless Pit while we walked the path around The Big Room Route. Actually...we saw it but we didn't 'see it' because it appears as a large black opening in the rocky area. You really can't see down in it but there is...More

Thank Janis H
Reviewed 23 March 2017 via mobile

Not entirely sure why this is an attraction within itself, as it is just another feature inside the cave on the Big Room trail. The sheer size of it is still neat!

Thank Geopiggy
Reviewed 14 February 2017

This is my favorite! You begin in the Big Room where you repel down a rope into the darkness below. Once down you wander through unlit areas by your group's headlamps only. It is an excellent and unforgettable experience. I done this several time and...More

Thank Shlomo P
Questions & Answers
Get quick answers from Bottomless Pit staff and past visitors.
Note: your question will be posted publicly on the Questions & Answers page.
Posting guidelines