Going into a cave is unlike any other experience. There are plenty of national parks in the U.S. with caves to explore.

Indiana Dunes National Park is one of the newest parks in the NPS system. The park sits on Lake Michigan and is close to several major cities.

Part of Utah’s Mighty 5, Bryce Canyon National Park attracts millions of visitors annually to its Martian-like landscape.

Located in southeast New Mexico, visitors to Carlsbad Caverns National Park can experience a massive cave network.

Olympic National Park in the far northwest corner of Washington State is an adventurer’s paradise. Here are some great facts about the park.

Arches National Park is an iconic national park in the U.S. The large arching rocks are a pinnacle in the landscape of the Southwest.

A solar storm leads to a northern lights super show that is expected to seen in the Northern United States on Tuesday.

Bear Grylls planned a “small, fun trip” through the Northwest Passage in 2010. He got more than he planned for.

From the depths of the ocean to Everest to space, what are the ethical implications of extreme tourism, which is often the realm of the rich?

The Grand Canyon boasts a pretty big reputation. Here are five things you didn’t know about Grand Canyon National Park.