This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

Hidden amid a collection of trails is the site of a tragic crash.

The remains of the iconic train crash from the movie 'The Fugitive' can still be found rusting along the Great Smoky Railroad.

A beautiful mountaintop mausoleum devoted to a Montenegrin icon can't seem to make everyone happy.

This virtually windowless mass of smooth concrete is the only Catholic church in the city.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A tiny church on a man-made island in the Adriatic.

Gargoyle head that brings good luck.

An ancient knight and a symbol of the city's freedom.

A curious cave church carved into the face of a cliff.

Singing sand that stands as the final remains of an ancient lake.

The current Eureka County Courthouse replaced an all-wooden structure that had previously been an ice-skating rink.

A small oasis not far from downtown Moab.

The fifth-longest natural arch in the world, and the longest outside China.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

US-50 in Nevada is known as "the Loneliest Road in America," but this earlier iteration of the route is even lonelier.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

At the base of Steens Mountain resides an otherworldly desert.

A stone pillar marking the location of the westernmost battle of the American Civil War only honors one side of the conflict.

This cave was hidden for thousands of years, storing the worldly goods of ancient Native Americans.

This tiny cluster of abandoned buildings looks like the future of the ghost town - today!

A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.

An off-the-beaten path cave with an underground lake.