Let Travel Channel be your guide as you discover the statues, monuments and memorials that make up Washington D.C.'s iconic national parks.

Here's our selection for the most exciting and unusual national park activities on land and sea and even deep underground, including sandboarding, spelunking and more.

Add this NYC stop to your national parks list.

Yosemite Valley is home to most of the park's largest attractions, including El Capitan, Upper Yosemite Waterfall, the sequoias, Glacier Point and Bridalveil Falls.

With more than 2 1/2 million visitors a year, Zion National Park is easily Utah's most visited natural landmark.

Our list of the 10 coolest ways kids can explore US National Parks this summer.

Crater Lake National Park is certainly not for onlookers alone: this is a park full of hands-on, outdoor adventure.

While there's nothing scary about Petrified Forest National Park, there is certainly something mysterious and wondrous.

Celebrate National Park Week with these amazing shots.

Despite its foreboding name, Badlands National Park is a magnificent landscape teeming with stunning mountains and beautiful prairies.

Touted as having therapeutic qualities, the pure waters flowing from hot springs have been enjoyed by bathers for centuries.

Visit US National Parks for free on Public Lands Day, Sept. 29.

Maybe the most unique place in the national parks.

Part national park, part tropical oasis and part geological masterpiece: any way you look at it, Hawaii Volcanoes National Park is a literal hotbed of activity.

Entering any of Carlsbad Caverns' 113 caves is like entering a larger-than-life sandcastle, where drips of sand have been changed into a twisting structure of peaks and spires.