An abandoned Cold War missile radar site.

An abandoned car and strange wooden debris are among the scattered remains of the old sand and gravel quarry.

The remains of a deserted steamboat sit rusting beside an old ferry pier and an abandoned train platform.

A lawless town deep in Death Valley was famous for its riches and death rate.

This stately structure has been abandoned for half a century.

This mysterious and creepy location instills a strong sense of foreboding in all visitors.

A muddy alien landscape that is home to rare species of exotic plants.

Romania's triumphal arch looks out over Bucharest.

17th century palace once a meeting place for politicians.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

This snug medieval lane is one of the narrowest streets in the world.

This eccentric folly house was designed by Romanian thinker Bogdan-Petriceicu Hasdeu, with a helping hand from his deceased daughter's spirit.

This enormous abandoned prison was once dubbed the "Bastille of Romania."

No one knows who built this strange cave of worship or exactly why.

Conspiracy theories and occult legends surround this mysterious natural rock formation.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

The legendary cliffside castle of three-time Voivode of Wallachia, Vlad the Impaler.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This massive underground salt mine now holds a sci-fi theme park in its depths.

Moss and stone turn this waterfall into an otherworldly liquid veil.

Along the old Route 66 is an abandoned trading post made from old telephone poles, built by a former circus clown.

A notorious Route 66 eatery once frequented by Al Capone.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."