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 Virginia

Let Travel Channel be your guide as you explore the stunning southern landscapes of Virginia's National Parks.

National Parks in Colorado

Let Travel Channel be your guide as you explore the vast and varied landscapes of Colorado's National Parks.

National Parks in Maine

TravelChannel.com takes you on an exploration of Maine's natural landscapes and national parks.

National Parks in Nevada

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

National Parks in Washington

Explore from oceans to mountains in the nation's northwest corner. Get a list of parks on TravelChannel.com.

National Parks in Delaware

Let Travel Channel be your guide as you discover beauty and adventure in Delware's National Parks.

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 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 Connecticut

Let Travel Channel be your guide as you discover the beauty of Connecticut's National Parks.
More from:

Your National Parks

On TV

12pm | 11c
On Tonight
On Tonight

Food Paradise

8pm | 7c

Man v. Food

10pm | 9c

Man v. Food

10:30pm | 9:30c

Man v. Food

11pm | 10c

Man v. Food

11:30pm | 10:30c

Food Paradise

12am | 11c

Man v. Food

1am | 12c

Man v. Food

1:30am | 12:30c

Man v. Food

2am | 1c

Man v. Food

2:30am | 1:30c
What's Hot
What's Hot

Bizarre Foods

Tuesdays at 9|8c

Follow Us Everywhere

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