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Arecibo Observatory

Certificate of Excellence
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Address: HC-3 CAJA 53995, Arecibo 00612, Puerto Rico
Phone Number: +1 787-878-2612
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9:00 am - 4:00 pm
Open now
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Sun - Sat 9:00 am - 4:00 pm
Recommended length of visit: 1-2 hours
Fee: Yes

Explore the wonders of the universe at the world's largest radio telescope...

Explore the wonders of the universe at the world's largest radio telescope located in Arecibo, Puerto Rico. Here, scientists from throughout the world use the 305 meter dish to gather radio signals from regions of star formation, planets, distant galaxies and the atmosphere.

Visit the Angel Ramos Foundation Science and Visitor Center which includes interactive exhibits. Enjoy the amazing view from the observation deck and don't forget the auditorium and souvenir shop.

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San Juan Day Trip to Rio Camuy Caves and Arecibo...
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Rio Camuy Cave Park and Arecibo Observatory from San Juan

TripAdvisor Reviewer Highlights

Read all 635 reviews
Visitor rating
  • 282
  • 244
    Very good
  • 76
  • 18
  • 15

Visiting the area you can get a taste of the universe, Such a huge antenna, famous not only for it's work but because of hollywood. The radio telescope has feature in several... read more

5 of 5 starsReviewed 2 weeks ago
luis g
Guaynabo, Puerto Rico
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635 Reviews from our TripAdvisor Community

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Metamora, MI
Level Contributor
4 reviews
common_n_attraction_reviews_1bd8 3 helpful votes
1 of 5 stars Reviewed 3 days ago NEW

The website said the observatory was open on February 3, 2016. So we spent over 30 minutes driving from the main highway up narrow, winding roads to get there. But when we arrived, the guard at the main gate told us that the Visitors Center had been closed for remodeling since October 2015. What a disappointment! So all we saw... More 

Thank SueCP
Guaynabo, Puerto Rico
Level Contributor
84 reviews
44 attraction reviews
common_n_attraction_reviews_1bd8 5 helpful votes
5 of 5 stars Reviewed 2 weeks ago

Visiting the area you can get a taste of the universe, Such a huge antenna, famous not only for it's work but because of hollywood. The radio telescope has feature in several films.

Thank luis g
Beaufort, Australia
Level Contributor
159 reviews
90 attraction reviews
common_n_attraction_reviews_1bd8 56 helpful votes
1 of 5 stars Reviewed 3 weeks ago

I find the observatory closed, I could believed it! The guard was at the door, friendly chapt , just told us the observatory was closed until April! What a jock I believe they should put a sign on the bottom of the road few km before the top that will stop people to drive to the top.

1 Thank Gheefrenchie
Schaumburg, Illinois, United States
Level Contributor
3 reviews
3 attraction reviews
common_n_attraction_reviews_1bd8 2 helpful votes
1 of 5 stars Reviewed 3 weeks ago

I had the same experience as other travelers. The observatory is closed until April 2016.There was no announcement on the web site in December when we took the trip.

2 Thank Tirsa M
Level Contributor
4 reviews
4 attraction reviews
1 of 5 stars Reviewed 4 weeks ago via mobile

All the travel ads in and around San Juan market this attraction. Great. So we drove there - There must have been dozens of road signs along the way all saying they are open. After over an hour drive we get there only to find out it's closed for half a year 😥. Not good tourism. This makes Peurto Rico... More 

Thank Ryan Y
San Jose, California
Level Contributor
6 reviews
5 attraction reviews
common_n_attraction_reviews_1bd8 2 helpful votes
5 of 5 stars Reviewed January 1, 2016

As someone who is very interested in astronomy and science, it was a must-see place, and worth the drive. It's really impressive and great, and good for families. I think it's currently closed (temporarily) so we were lucky to see it open.

1 Thank Ada R
Oakville, Canada
Level Contributor
199 reviews
75 attraction reviews
common_n_attraction_reviews_1bd8 103 helpful votes
1 of 5 stars Reviewed December 30, 2015

We made the arduous trip from San Juan just to see the largest radio telescope in the world, featured in so many films, only to find there that it's been closed for some time and is only tentatively scheduled to reopen until February 2016. It means for us we'll never see this marvel of engineering, or get the t-shirt.

1 Thank Khufu8
Sterling, Illinois
Level Contributor
20 reviews
5 attraction reviews
5 of 5 stars Reviewed December 28, 2015 via mobile

Although now old technology, this is still a very impressive visit. Nice visitor center. Not a bad drive getting there. Still in use but some areas are off limits. Small entrance fee and souvenirs to take home.

Thank NewtonJames
Level Contributor
19 reviews
7 attraction reviews
common_n_attraction_reviews_1bd8 19 helpful votes
1 of 5 stars Reviewed December 15, 2015

All Travelers should be made aware you are closed for an extended time and not like us and all the others we met that day find out after traveling two or more hours to get there to find out it is closed. That is what websites are for, as for someone who has always wanted to see this site and... More 

6 Thank Tjwalsh11
Seattle, Washington
Level Contributor
27 reviews
16 attraction reviews
common_n_attraction_reviews_1bd8 23 helpful votes
3 of 5 stars Reviewed December 11, 2015

Went over the hills and through the valleys literally to get the dish. I wish it had more to do at it. But it satisfied the Bond fan in me. Definitely do it with the local caves a short drive away, but not worth driving to on its own.

Thank aview2akill

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Questions & Answers

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Typical questions asked:
  • Do I have to buy a ticket for my infant?
  • How do I get there using public transportation?
  • Is there a restaurant or café onsite?