National Parks in Puerto Rico

San Juan National Historic Site, Puerto Rico

San Juan National Historic Site, Puerto Rico

Photo by: National Park Service

National Park Service

San Juan

National Historic Site, San Juan, PR

The massive fortifications, cannons, dungeons and turrets overlooking the azure Caribbean are a sight to behold, but there’s more hidden underground. A network of “secret” defensive tunnels runs below the fortifications of Castillo San Cristobal, and only two 15-person tours are given every weekend to those who sign up first.

Photo by: By AlbertHerring (Own work) [CC BY-SA 3.0 ], via Wikimedia Commons

By AlbertHerring (Own work) [CC BY-SA 3.0 ], via Wikimedia Commons

Keep Reading

Next Up

National Parks in Virgin Islands

TravelChannel.com takes you on a trip to the national parks in tropical Virgin Islands.

National Parks 101

As we gear up to celebrate the 100th anniversary of our National Park Service, let’s take a look at how it all came to be. 

National Parks in Georgia

Let Travel Channel be your guide as you discover the lush landscapes and rich history abundant in Georgia's National Parks.

National Parks in Hawaii

Let Travel Channel be your guide as you discover the mythical legends, wartime memorials and stunning, volcanic landscapes that make up Hawaii's National Parks.

National Parks in Oklahoma

TravelChannel.com takes you on a trip to the national parks of Oklahoma.

National Parks in Maryland

TravelChannel.com takes you on a tour of the national parks, historical sites and must-see places in Maryland.

National Parks in Oregon

TravelChannel.com takes you on a trip to Oregon's national parks.

National Parks in Missouri

TravelChannel.com takes you on a trip to see national battlefields, rivers and parks in Missouri.

National Parks in Nevada

TravelChannel.com journeys to Nevada's national parks to see deserts, basins and trails.

National Parks in Minnesota

TravelChannel.com shows you the great outdoors and national parks of Minnesota have to offer.
More from:

Your National Parks

What's New in Interests

Follow Us Everywhere

Join the party! Don't miss Travel Channel in your favorite social media feeds.