A forgotten Cold War relic hidden in the outskirts of a Wisconsin city.

Hidden in magnificent rolling countryside, see what may be the largest modern stone circle in the world at Wisconsin's very own "Stonehenge”

The unusual patterns in this rock formation result from two distinct modes of weathering.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

One of the largest, oldest, darkest, quietest motel rooms in the world.

Most-visited and most-photographed slot canyon in the American Southwest.

Thousands of glyphs created by an unknown culture decorate the rock formations of this canyon.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A tunnel with windows, so you don't miss out on the impressive views.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

Dramatic river bend surrounds a natural red-rocked pedestal.

Rippling sand dunes frozen in the Arizona rock.