This massive railroad spike celebrates the 1939 premiere of the movie “Union Pacific.”

One of the oldest operating hydroelectric power schemes in Australia.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

During the solar phenomenon "Lahaina Noon" this bendy, curvy sculpture forms a perfectly circular shadow on the ground.

A preserved section of the Atlantic Forest is an important habitat for these critically endangered monkeys.

This unassuming riverbank is Missouri’s first designated site in the National Underground Railroad Network to Freedom.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

A beautiful combination of living flora with preserved bones covers the shelves of this shop.

This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

The oldest continuously-operating Chinese restaurant in the United States has been in business since 1911.

The trunks of 3,000 year-old trees lurk beneath the surface of this crystal clear lake in Oregon.

A clear blue swimming hole with hidden caves, still unexplored.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A museum dedicated to the alleged Roswell Incident.

Abandoned since the 1950s, the streetcar lane beneath the heavily trafficked bridge lays empty and unused.

The entrance to this sinisterly named tunnel hides behind a Tim Hortons.

Faces carved into the cliffs create an otherworldly walking trail.

An enormous natural sandstone bridge in Kentucky.