These Pennsylvania rocks conceal an ancient maze you can walk through, making it a unique destination for adventure seekers.

In 1869, John Wesley Powell was studying layers of rock in the Grand Canyon when he noticed an unconformity in the layers. Around a billion years were missing, and the problem turned out to be global.

Shawnee National Forest turns Illinois rugged, with sunset cliffs, mossy canyons, and trails that trade noise for wonder.

Smith Rock State Park near Redmond, Oregon is the perfect answer to that need, offering postcard-worthy scenery and outdoor fun that’s accessible enough for a spontaneous day trip but impressive ...

Here’s the deal: you live in Virginia, which means you have access to one of the most spectacular underground attractions on ...