After a nearly successful attempt on Hitler's life, the conspirators met their fate in the courtyard of this Berlin building.

An old tram depot transformed into a vintage car paradise.

Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

Tiny memorials honor individual victims of the Holocaust.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

Floating swimming pool within a moored vessel.

A Romanesque tower appears when water levels drop.

A Spanish forest is filled with mysterious stone carvings.

Recently celebrating its 25th anniversary, the garden opened in September 1997 to celebrate the men and women who have had the greatest impact on Key West.

Dedicated to the "World's Luckiest Fishing Village."

Recycled junk and fishing buoys litter the yard and facade of this bait shop cum art project.

A mysterious castle built as a monument to lost love.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

In 1958, an MIT fraternity pledge laid down on this bridge and instituted a new, unique unit of measurement.

Barcelona's only remaining tram system takes riders to the Tibidabo funicular.

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

A cemetery in Barcelona's Poblenou district is home to this touching funerary statue, which depicts death in the form of a winged skeleton.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

This cemetery features modernist statues as strange as its name.

A beautiful but toxic fountain of mercury.

Hidden in the plaza next to a pizza shop is an amazing little oddities shop.

A gleaming white tower in ornate Indian style soars above the low-slung bungalows of north Tampa.