Floating swimming pool within a moored vessel.

Six beautiful wooden giants are hidden around Copenhagen.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

Detailed facade of a brownstone in Boerum Hill.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The oldest surviving synagogue in New York City is now a soaring art space.

You've probably seen these distinctive orange-tiled columns on the big screen.

One of the most iconic neon ads of former East Germany.

This monumental work of art symbolizes the coming together of a previously divided city.

Inside this Jewish cemetery is a memorial to soldiers who deserted the German army and were executed.

If the tunes of antique organs and musical marionettes don't intoxicate you, the draft beer certainly will.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

This concrete residential area doubles as an open-air gallery.

This sprawling Jewish cemetery is one of the largest in Europe.

Berlin's beloved bear is immortalized at the Museum für Naturkunde.

A towering monument to war, located on a beautifully peaceful hill.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.