Take respite inside this jaw-dropping church while climbing the volcano where Georgia's Prometheus was once chained.

Unusual building appears to be haphazardly built from randomly piled bricks.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

A gleaming white and undulating tower marks the border between Georgia and Turkey.

A literally moving statue of stacked metal giants just continually trying (and failing) to find love.

The first skyscraper to include a Ferris wheel built into the facade.

An isolated dive site teeming with cnidarians.

A Florida college boasts the world's largest single-site collection of structures designed by Frank Lloyd Wright.

These abandoned ruins in the middle of Jaffna have withstood centuries of tumultuous power struggles.

This abandoned fishing settlement may well be the greenest village in the world.

A rare pod of derelict midcentury Futuro and Venturo houses lines a semi-abandoned beachfront resort outside Taipei.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

A line of abandoned, alien-like fortresses dot the mountains of North Italy.

This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

An abandoned monument remembering the "Pančevo Holocaust" now stands as a shadow of its former self.

A forgotten and crumbling Yugoslav monument to the victims of fascism.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

Abandoned blockhouses from Nazi Germany's Atlantic Wall erode into the sea on a French beach.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

A haunting theme park is slowly being swallowed by the jungle.

This enchanting hamlet carved into the rock looks like something straight out of Tolkien's Rivendell.

Now abandoned, the world's first torpedo factory is crumbling into the sea.

A long-abandoned provincial prison left to crumble in the frigid air of Ontario.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.