Climb inside an iron crystal magnified 165 billion times its normal size.

This tremendous timepiece was once the largest cuckoo clock in the world.

Next to the well-known retaining weir "Hochablass" is the former raft port for the city of Augsburg.

This unique structure allowed boats to bypass underwater mine barriers in the channel to enter the harbor.

A unique two-level bridge designed to honor a king.

This 15th-century church houses priceless works of art from a range of Croatian artists.

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

Gargoyle head that brings good luck.

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

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

Yugoslavia's biggest underground airport lies in ruins.

Hidden in the forest are the remains of a former World War II chemical plant.

In the city forest of Augsburg are oval, artificial ponds formed from a World War II bombing campaign.

Long buried under the 20th-century landscape, this lift lock of the Alexandria Canal is the lone remnant of an ambitious early American transportation project.

This abandoned Greek island was the last active leper colony in Europe.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

This strange statue features a bust of the famous composer plopped atop a woman's body.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

Ugly 18th-century dwarf statues living in a perfectly landscaped Austrian garden.

The "dragon babies" of southeastern Europe.

A miniature train-ride through Slovenia's largest cave system.

This massive subterranean fissure is known as the "underground Grand Canyon."

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

A cemetery for Slovenian notables also serves as a popular recreation space.