Underground River San Jerónimo

To visit this underground river is a Little more challenging that the “Chonta” as it has more wáter and the cave system is larger.

When we arrive at the Grutas de Cacahuampilpa (the caverns of Cacahuamilpa) we have to walk to the entrance of the underground river.

Once there, we are going to get wet! We will get into the river and swim towards the mouth of the cave which we will enter in order to admire the rock formations that have been formed through the years in the engulfing darkness of the place.

The experience of walking in the half light, on mounds of sand or with the river current pulling at your waist will make you feel the energy of nature.

Finishing this journey so dark that you can’t see your hands in front of your face without a light, we will enjoy a local meal.

What is included?

  • The loan of a rucksack
  • Lunch
  • Accident insurance
  • Qualified guides
  • Transport
  • Safety equipment
  • Entrance fees
  • Head torch
  • Life jacket
  • Helmet

What to Bring

  • Towel
  • Sun cream of at least factor 30
  • Complete change of clothes
  • Insect repellent
  • Wash kit
  • Mountain coat
  • Boots or trainers with a treaded sole and which protect the ankles
  • Comfortable shirt and trousers, preferably made of synthetic fibres and not cotton, including jeans.
  • Large bag for your wet clothes at the end of the descent


  • Neck scarf / Buff
  • For those who use glasses, cord to firmly tie glasses
  • Waterproof trousers of lycra leggings
  • Waterproof camera or camera in a waterproof case

This is not recommended for pregnant women, people with neck or back problems, people with haemophilia, asthma or epilepsy or for people with heart problems.