A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

This amazing ancient cave was kept secret for seven years to protect it from the public.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

The world's only official college program focused on "clown therapy."

This clock is an architectural flourish that stands out as a landmark among a unique Israeli German community.

The history of Tel Aviv told through a work of art.

This slender three-story building has also had several famous residents.

Those belting out show tunes in this West Village piano bar might not realize it marks the site where Thomas Paine died in 1809.

The best way to get a sneak peek at the movies.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

One of New Jersey's oldest churches is a historical treasure trove.

The 570-ton boulder that gave a New Jersey town its name.

Step into Monet's world at this fine-dining restaurant in the middle of a New Jersey sculpture park.

A unique sculpture park that specializes in the huge and bizarre.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

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

Where once there was a train station bathroom, there is now this German burger joint.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A haunting contrast of trains that both saved and took the lives of Jewish children in Nazi Germany.

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

Thousands of coffin-like pillars make up this controversial Holocaust memorial.