This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

This popular pilgrimage site offers a hole filled with holy healing dirt.

A unique geological area spiked with wind-carved rocks that resemble teepees.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

This black shoreline is made up of exploded lava particles.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

The first home of the doomed aviatrix Amelia Earhart.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

The grave of the iconic Kentucky Fried Chicken mascot features a bust of the man behind the goatee.

The world's longest known cave system.

Where the author wrote her beloved "Little House" books.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

"Polynesia on the Plains."

An ornate Art Deco tile mosaic representing Nebraskan life, both modern and prehistoric.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

It would be easy to walk past this unusual piece of art and have no idea it pays tribute to the odd life of a real chicken.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

The first North American landing spot for James Cook on his third voyage of discovery in the Pacific.

On the Oregon coast there is a natural hole that seems to be draining the sea.

There are eight natural springs around town, each with a slightly different taste.