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

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

A sharp bend in a dramatic river canyon cut through red rocks.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

See massive fossils that are over 200 million years old in northeastern Arizona.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

This historic national park is covered in the stunning ruins of red rock pueblos.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

Ancient pueblos built into the base of a natural canyon wall.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

An old railroad grade built for the construction of Hoover Dam is now a recreational trail featuring several tunnels and sweeping views of Lake Mead.

Originally built as a promotional giveaway, this suburban house was designed to be an IRL version of the Simpson home.

This vintage animatronics show is the Vegas version of a walk through the woods.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

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

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

Quite simply the largest tree in the world (by volume).

Four hundred granite steps were built into this massive rock by the National Park Service.

A water tower shaped like a giant coffee pot looms over a small Swedish village in Central California.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.