cave / adventure · Bonito, MS
Abismo Anhumas
You enter by a 72-meter rappel down to an underground lake surrounded by limestone cones. Down below you can snorkel or scuba dive among the formations.
Illustrative images. The pictures in this guide are illustrations based on the real place, not photographs, and may differ from it.
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About Abismo Anhumas
The Abismo Anhumas is a cave with an underground lake of crystal-clear water, about 24 km from downtown Bonito. It is the most extreme tour in the region and one of the most sought after: you descend 72 meters through an opening at the top of the rock to a deck over the lake far below.
The cave was only first explored in 1970 and opened to visitors in 1999. Inside, light enters through the opening and illuminates a huge chamber. The lake has very clear water and hides large limestone cones rising from the bottom.
Down below there are three ways to experience the lake: sightseeing only, on a raft ride with the guides lighting up the formations; snorkeling with a mask, to see the cones from above; and scuba diving, for certified divers or as a beginner's try dive.
The number of visitors per day is small, and you must complete a preparation session the day before. The water is cold and the tour takes some stamina, but you do not need to be an athlete. Ask about the minimum age and accessibility conditions when you book.
Before you go
Practical information
How much time to set aside
The tour takes about three hours inside, not counting travel time or the preparation the day before.
Best time
Year-round. Around midday, with the sun higher, light comes through the opening and lights up the lake best.
How to get there
It is about 24 km from downtown Bonito, on a rural road. Transportation is not usually included: go by your own or a rental car, or with a transfer booked through your agency.
Tip
Spots are few and sell out early during school vacations and holidays: book as soon as you set your trip dates, and leave a free day beforehand for the mandatory preparation.
A look at the place
Abismo Anhumas in pictures
These pictures are illustrations based on the real place, not photographs. They may differ from the place.
Click the picture to enlarge it.
Get your questions answered
Frequently asked questions about Abismo Anhumas
Do I need rappelling experience for the Abismo Anhumas?
No. The descent is done with safety equipment and guides, and everyone goes through a preparation session the day before.
How deep is the Abismo Anhumas?
The descent to the deck over the lake is 72 meters. The lake itself is much deeper and has very clear water.
How long does the trip last?
About three hours inside the cave, not counting travel time or the preparation the day before.
What can you do down there?
Sightseeing on a raft ride, snorkeling with a mask, or scuba diving. Each option has its own price and requirements.
Why is it so hard to get a spot?
The number of visitors per day is limited. In Bonito, tours are sold through agencies, so book well in advance.