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 in Texas

Let Travel Channel be your guide as you explore the rugged terrain and geological wonders of Texas National Parks.

National Parks in Iowa

Let Travel Channel be your guide as you explore the wonders of Iowa's National Parks.

National Parks in Michigan

TravelChannel.com takes you north to see rock formations, lake shores and other national parks and sites in Michigan.

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 Tennessee

Traverse lush, plant-lined trails, historic battlefields and breathtaking mountains summits in Tennessee's National Parks. Travel Channel has the details.

National Parks in California

Travel Channel guides you through California's numerous state parks, from Yosemite to Death Valley.

National Parks in Wisconsin

With inviting landscapes and shoreline along two Great Lakes, there's plenty to see and do in Wisconsin. 

National Parks in Vermont

Let Travel Channel be your guide as you explore Virginia's National Parks.

National Parks in Kansas

TravelChannel.com takes you to the parks and prairies of Kansas.
More from:

Your National Parks

Follow Us Everywhere

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