Dubbed "Wistom" by locals, this abandoned factory is an urban explorer's dream.

Colorful lights and mirror-like brine pools create trippy illusions within the historic mine.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

The site of the Wellington avalanche, one of the America's worst railroad disasters.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

A fake town founded by Western movie stars is now becoming a hip desert community.

An artist's vision for connectivity spans seven continents and 16 countries.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

The final resting place of New England's last "vampire."

Its 27 graveyards represent the many nationalities and ethnic groups that voyaged to this wilderness in the late 19th century.

This sprawling 18th-century cemetery features unique and beautiful gravestones, including one shaped like a tree.

The final resting place of a suffragist author.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

This hidden labyrinth offers walkers some brief peace of mind.

A tiny monument to the classic American candy.

One man's psychedelic fence is painted with his cacophonous folk art musings on the world.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

The ruins of a 19th century shelter run by the Independent Order of Odd Fellows.

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

A historic hotel in an old California railroad town with a rowdy reputation.

Where the polar bear watches over everything, and every drink is a double.

This railroad overpass is said to be home to a murderous goat-man whose very legend has led to very real deaths.