Terrifying derelict military hospital once housed a recuperating Hitler.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

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

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

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

The oldest funicular in Lithuania has been climbing this steep hill since 1931.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

The ruins of an Estonian prison are drowning in the quarry lake where the convicts were once forced to work.

Legend says lovers who hold hands while venturing along this stone jetty and kiss at the end will remain together forever.

A small but hugely whimsical theater where marionettes play out the "The Battle of Stalingrad."

The only Bahá'í house of worship in North America and one of only a handful worldwide.

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

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

Brussels' favorite peeing boy has a sister.

A little sculpture with a large wardrobe.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

As the Dead Sea continues to deplete, massive sinkholes open along its banks.

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

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

The secret cells in the basement of the KGB's Estonian "Grey House" have been preserved as a grim Cold War museum.

A secluded art gallery hidden within the cellars beneath Tallinn’s medieval monastery.

World War II bunker still standing on the New Jersey beach.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

This elaborate towering structure was once famed for its revolutionary height.