Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A Nazi concentration camp and Anne Frank's place of death.

The history of German architecture is explored across this fairy-scale mini-city.

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

Tiny memorials honor individual victims of the Holocaust.

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

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

The most visited, and possibly most controversial, museum in Germany.

A nostalgic bibliographic gem.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

Home to items never before seen by the public.

The rodent-shaped sidewalk imprint that earned worldwide media attention.

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

A speakeasy takes on Chicago's drinking culture.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

A lone lighthouse on the wind-swept shores of the cape.

This lighthouse sits within a glacial valley.

Newfoundland's last remaining granite lighthouse.

The oldest natural history museum in western Canada houses more than 5,000 vintage botanical and zoological specimens.

A remote landmark named for a whimsical photograph taken by a 1850s photographer and his crew of graffiti artists.