1. United States
  2. Northern Region, Puerto Rico
  3. San Juan
  4. Cueva Ventana

Cueva Ventana and Arecibo Observatory Tour

Product ID: 75910
The Window Cave is a unique ecologically oriented experience. On a short hike, your bilingual environmental interpreter will introduce you to Taíno culture. Discover the geological formations of a karst cave.
About this activity
Duration: 5.5 - 8 hours
Starting time 8:00 AM
Printed or mobile voucher accepted
Instant confirmation
Live tour guide

Pickup included

At selected accommodation in San Juan.
Free cancellation up to 24 hours before activity starts

Select participants and date:



  • Hike to the cave and learn about pre-Colombian Taíno culture
  • Take a short hike to the cave and learn about the animals that live there
  • Discover a live cave that leads to the most exhilarating panoramic view
Full description
After a 75-minute drive from San Juan you will experience a unique adventure. Cueva Ventana is certified by the Tourism Department as only natural cave in the ecotourism program. The cave is on top of a limestone cliff in the Arecibo area.

Your bilingual interpreter will introduce you to the native flora and fauna. Take a short hike to the entrance of Cueva Ventana. Your guide will chat about the Taino culture, engravings and petroglyphs. You'll also learn about the cave's resident bat and non-poisonous giant spiders that call the cave home. Participate in a conservation project to minimize human impact on this population of sensitive animals.

At the end of the cave you’ll have a breathtaking view of the Rio Grande de Arecibo Valley. On your return, a stop is made at a local restaurant for lunch (not included in the price of the tour).

Then your tour continues to the Arecibo Observatory. Nestled in the mountains of northern Puerto Rico, the observatory is home to the world's lsecond largest radar/radio telescope. Scientists from around the world make use of the giant 1,000 foot-diameter dish to listen to the universe and monitor the Asteroides that flyby close to the Earth. You’ll have views of the huge telescope from an observation platform, where its austere metallic symmetry shimmers in dramatic contrast to the dense, green, tropical landscape.At the end of the cave you’ll have a breathtaking view of the Rio Grande de Arecibo Valley. On your return, a stop is made at a local restaurant for lunch (not included in the price of the tour).
  • Round-trip transportation
  • Tour guide
  • Entrance to the cave
  • Use of protective equipment and flashlight
What’s Not Included
  • Lunch
  • Gratuities
Not suitable for
  • Pregnant women
  • People with mobility impairments

Prepare for the activity

Important information
Not allowed
  • Pets
Know before you go
• Tour is open to children 6 years and over
• Your should not be afraid of darkness or heights
• You need to be in good physical condition
• Not recommended for participants with heart, lung or back problems
• Please wear tennis shoes or closed-toe walking shoes for the hike
• Please wear comfortable clothing
Customer reviews
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Arrived 55 min early to tour and had to sit around outside until tour started. Tour guide was basically a driver and offered no insight into local history, culture or politics.

November 10, 2019

Tour cancelled last minute. Terrible experience.

October 6, 2019

January 2, 2019

Organized by

Castillo Tours

Product ID: 75910