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

The first declared National Monument in the United States.

The largest wildlife crossing in Utah allows local fauna to safely traverse the six-lane Interstate 80 at Parleys Canyon.

A pair of giant legs paying homage to a poem, a king, and it would seem, socks.

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

One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

To find the "unicorns of the deep" you've got to go downstairs.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

A Bibliophile's Dream.

The Bong-area park police have asked visitors to please, stop stealing the signs.

One of Frank Lloyd Wright's final works was this UFO church.

Wisconsin's most celebrated export gets the royal treatment on I-94.

Statue dedicated to the star of an old television show.

This striking art museum holds an amazing series of curiosity cabinets.

Dance on a hand-hewn log floor padded with bouncy boxcar springs at a saloon built in 1883.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

One part antique store, one part curiosities hodge-podge.

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

A grove of colossal man-made flowers built to collect the sun's rays.

The abandoned remnants of a little sanctuary for world peace that fell into disrepair.

Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

Australian museum dedicated to human health and lack thereof.

Children's author May Gibbs's beloved stories about the tiny, human-like "Gumnut Babies" are immortalized in bronze.