This stunning snorkeling and scuba spot in Maui is the perfect place for spotting marine life, and experienced divers can ...

Sunny Jim's Sea Cave in the La Jolla neighborhood of San Diego, California, has been an ocean destination for 123 years.

The cave is one of about 275 known caves in Sequoia and neighboring Kings Canyon National Park. The park's only publicly accessible cave, it has been open to visitors since the 1940s, making it one of ...

Traverse 330 steps on the way to such distinctive chambers as the “Devil’s Kitchen” and the “Crystal Vault.” Wild caving ...

A 30-meter sediment core extracted from the “Great Blue Hole” in Belize offers the longest continuous record of storm ...

Analysis of the sediment in Belize’s Great Blue Hole shows a concerning trend. Blue holes, the name for collapsed limestone ...

Most people think of visiting big cities, national parks, and beaches when they plan a U.S. trip. There’s hardly anyone who’s ...

The island hopping is incredible, but Greece's ancient ruins, ski resorts, wineries, thermal pools, and pristine beaches ...

Sheer drama. That's what the Great Sand Dunes are. Starkly beautiful desert dunes set against a backdrop of pretty, snow-capped mountains—not something you'll usually see in any popular places you'll ...

This extraordinary discovery not only redefines our understanding of salt caves but also adds a geological wonder to Israel’s ...

NPCA shares the latest archaeological discovery at Mammoth Cave National Park, which has a pretty fascinating human history, too.

The 1,400-acre Bottomless Lakes State Park, established in 1933, holds the distinction of being New Mexico’s first state park ...