The secret wartime bunker built on the platforms of an abandoned Tube station.

An abandoned World War II tank left to rust in the downland.

This eerie abandoned building with a dark history is said to be one of the most haunted places in the Philippines.

This imposing 20th-century castle was abandoned before it was ever completed.

A perfectly preserved abandoned criminal asylum in South Australia.

The decaying remains of a once-luxurious Soviet spa town.

Built to be the ideal penitentiary, this abandoned panopticon saw several revolts and even a prisoners' coup.

Abandoned for over a century, this chilling train tunnel is now a destination for ghost hunters.

A fascist-era rural village abandoned since the early 1980s.

This hidden gem is bathed in beautiful natural light.

The ruins of a medieval monastery named after a type of tree.

This rusted shipwreck directly in front of a century-old abandoned lighthouse looks almost surreal.

Wander among the abandoned ruins of this once-powerful medieval town.

A forsaken beachfront condo abandoned after the Boxing Day Tsunami.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

This homegrown adoption center offers a wonderland of feline companionship.

Live long and prosper in Tennessee.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

The largest stone moai on Rapa Nui.

A museum celebrating the Canadian forces that liberated Belgium from the Nazis replete with battlefield miniatures and multiple Gardens.

A wellspring of natural Viagra found in Bosnia.