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Time9 hours (Approx.)
TransportHotel pickup offered
TicketMobile ticket
Offered in: English


Get an insider’s look at two of Puerto Rico’s most massive attractions, the Arecibo Observatory and Rio Camuy Caves Park, on this 9-hour day trip from San Juan. Descend inside a million-year-old cavern (one of the three largest underground river systems in the world) on your Camuy cave tour. Then prepare for an out-of-this-world visit to the world’s largest radio telescope at Arecibo, a giant concrete bowl wedged in the hills of Puerto Rico’s northern coast. Your tour also includes a guide and pickup and drop-off at most San Juan hotels.
  • Day trip to the Rio Camuy Cave Park and Arecibo Observatory from San Juan
  • Descend into the depths of a million year old cave
  • Enjoy a guided tour of the third largest underground river cavern in the world
  • Visit the world's largest radar/radio telescope
  • Pickup and drop-off from most San Juan hotels

From $107.10 USD

$119.00 USD  Save $11.90 USD

Lowest Price Guarantee
Discover two of the biggest attractions that Puerto Rico has to offer on this combination Camuy Caves and Arecibo Observatory day trip from San Juan. If you’re hoping to check out Puerto Rico’s natural wonders and more unusual sights, this is the perfect tour to get deep inside (literally) two of the island’s more unexpected landmarks.

Start your day with a pickup between 7am and 8am at your San Juan hotel, continuing on to the incredible Camuy Caves system in the northwest part of the island. Step inside the subterranean world of this underground complex for a safe guided tour of its soaring interiors, strange sinkholes and eons-old stalactites and stalagmites. Close your eyes and listen to the echoes of the thunderous tropical river that still flows through the cave’s many chambers and channels, continuing the slow expansion that started millions of years ago.

Continue on to the Arecibo Observatory, a monster-size concrete bowl that looks as if giant dropped it between the foothills along Puerto Rico’s craggy northern coast. Learn about the scientists from all over the world that journey to this famous 1000-foot (305m) diameter dish to listen to the sounds of the universe, studying the radio emissions from distant galaxies and quasars. Then head to the observation platform, where you can view this enormous scientific instrument up close, its metallic surface glinting against the earthy green foliage that surrounds its rim.

Finish your day with a return trip to San Juan, arriving back at your hotel around 4:30pm.

Please note that lunch and entrance fees to the attractions will be at your own expense.


Viator Traveler's Reviews

113 Reviews
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, Sep 2017
, Jul 2017

The Camuy Caves are really spectacular and definitely worth the visit if you have extra time while visiting Puerto Rico. The tour essential is more transportation than a tour. They will pick you come from a major location, such a hotel and take you to the town of to theCamuy Caves and the Arecibo Observatory is. So basically, understand that the tour is more transportation from point A, B, C. Please note, when arriving to the Camuy Caves, expect at least 1 hour wait before being able to take the tour. And you will need to pay your own admission fee. Admission fees are not included in the tour. After visiting the Camuy Caves, the tour will take you to a small roadside restaurant for lunch. From there it's off to the Arecibo Observatory. The Arecibo Observatory is great for kids, lots of cool, educational displays. I would not necessarily put the Arecibo Observatory on the must see list unless you are doing this tour and it's included and you have extra time for your visit to PR. I will say the actual telescope structure is pretty magnificent! So even though you'll only need a few minutes to take in the radio telescope at the Arecibo Observatory, it's pretty awesome to see this magnificent feat. Again, you will have to pay your own admission fee to the Arecibo Observatory.

, Jul 2017

First of all, let me start by saying that both attractions are very nice and interesting and I enjoyed them both.

However, you should know that when you book this tour, you are only paying for the transportation for these two attractions and nothing more. The guide/driver was very nice with interesting commentary, however, the price of this tour is kind of ridiculous considering you still have to pay to get into both attractions and then the guides for each attraction will take over anyway.
So indeed you are only paying for the transportation. It would be cheaper if you're a small group or family to just rent a car and drive there yourself.

I don't see any added value for this tour. Better do it on your own.

, Jun 2017

This tour was interesting. The cave was amazing and the observatory was interesting, although the short hike up the mountain was a little more than we expected. The countryside was also really interesting.

, Mar 2017

Operator was professional, friendly and knowledgeable. The Camuy cave park was impressive we went early in the day so it was not at all crowded. The Arecibo observatory's museum is geared towards a younger audience middle schoolers so we did not get as much out of the experience. Still nice to an impressive engineering feat.

, Mar 2017

Excellent, knowledgable, friendly guide. Great fellow travelers. The caves are majestic and awe-inspiring inside Arecibo is a also awe-inspiring for nerds and regular folks alike. Transportation exceeded expectations, and the day flew by.

, Jan 2017

Arecibo Observatory was a hike up the mountain to watch a movie to hear about the observatory.
Rio Camuy was fun walking inside the cave was fun. Ricky Ricardo our driver was informative and fun.

, Oct 2016

It wasn't till I looked back at my reservation that I saw the sites they drive you to are extra. I think you need to RENAME this tour as Transportation to Rio Camuy Cave Park and Arecibo Observatory from San Juan

, Sep 2016
, Aug 2016

The caves were spectacular and the weather held out for us on the visit up to the Arecibo Observatory. Both were well worth it and I highly recommend this combo tour!

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Product code: 4170RIO

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