Giant granite rocks standing end-to-end like a train of circus elephants.

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

Erosion and time have created a naturally-formed water park.

Electrical pylon in the shape of Disney's beloved mouse.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

America's only nuclear missile silo open to the public.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

A hillbilly theme park that proved so unpopular the land wouldn't even sell on eBay after it closed.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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.

The largest source of fossilized insects anywhere.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

The "lovely red Vega" of the legendary record-settling pilot.

Cannon designed to fire an atomic warhead.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

Less a museum than a bizarre fantasy world created by artists and engineers.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.