Mountains

Since its original beginnings as a weather observatory mountaintop, this facility played an instrumental role in gathering atmospheric data for almost 100 years.

The museum isn't crazy, it's a museum of Sweet Grass County history complete with a replica Norwegian stabbur.

A former millstone quarry in the Italian Alps is strewn with rocks bearing distinct round shapes.

This harrowing climb along West Virginia's jagged spires is one of the only Via Ferrata on America's east coast.

At the western edge of Palm Springs, a rugged desert canyon trail leads to a waterfall at the base of the San Jacinto Mountains.

During the American Revolutionary War, iron excavated from this mine was used to make swords, cannons, and more.

The early 20th-century home features cutting-edge technology of the day, such as ammonia refrigeration and needle showers.

Red rock "fangs" jut out of the desert near the Extraterrestrial Highway.

A long-worshipped mountain, considered a "power spot" and suspected to be an ancient pyramid by some.

These 250-year-old wagon tracks are a lasting sign of Dutch migrants crossing the mountains.

This 19th-century hotel and spa hosted famous guests like like the Vanderbilt family, William Waldorf Astor, Helen Keller, and Jay Gould.