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

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

A Beaux-Arts triumph set to become Ford's innovation campus

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

Venice's island of the dead.

An intricately carved Viking church overlooks a glistening fjord.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

This innocent-looking townhome is actually a subway exit.

The convergence of two currents makes this a surprisingly pleasant getaway in the Arctic Circle.

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

Where once there was a train station bathroom, there is now this German burger joint.

During the holidays, a vintage subway train whisks New Yorkers back in time.

The tale of a strong-willed woman who stood her ground when the commercial world came rumbling in.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

Far from the shore, this sandy victim of the Skeleton Coast looks like it was plopped in the middle of the desert.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

A monument to the love people have for their pets.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

This Scottish bridge seems to compel dogs to leap to their death.

Giant, pink stuffed rabbit on an Italian mountain.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

A town church once nearly submerged by the damming of a river is now hauntingly visible as the water recedes.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.