One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

This museum remembers the tough Mormon trek across America through an intriguing array of artifacts.

Largest man-made excavation on earth!

Come for the speed, leave in love with the desert.

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

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

This 19th century granite fortification is one of the most well preserved forts in New England.

On a barren hillside in the Yucca Valley, the recently restored Desert Christ Park has attracted pilgrims and kitsch hunters for over 50 years.

This dormant volcanic crater has been converted from a roiling pit of magma to a pleasant hiking spot.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

In which a local geological marvel becomes a quaint roadside attraction.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

An unrealized dream to wirelessly electrify the entire Earth.

The site of America's first commercial oil well essentially disappeared after the town went bust.

Where the oil industry began.

Behold the rickety glory of one of the oldest roller coasters still standing.

This dramatic rail curve was once the target of a failed Nazi attack.