This museum promotes informed contraception by documenting its often secret past.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

The house that took a plunge into the facade of a museum.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

Handsomely crafted representations of our round planet.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

An enormous park-like oasis, full of famous Chicagoans' graves.

A speakeasy takes on Chicago's drinking culture.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

A replica of the Liberty Bell rang daily from West Berlin's City Hall throughout the Cold War.

The sweet story of how American cargo planes became known as "Candy Bombers" during the Berlin Blockade.

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

Metro station with a claim to rock n' roll fame.

Cold war icon and onetime "hole" in the iron curtain.

A 12th-century fortress containing some of Berlin's oldest buildings.

Twisted buildings adorn the banks of the Rhine river.

A restaurant and observation deck built in a unique broadcasting antenna.

A unique hanging cable-car navigates through Dresden, the oldest suspension railway in the world.

A striking 12th-century-style castle built on the edge of a cliff.

Silent memorial, using bone conduction to take people back to the Dresden Bombing of 1945.

A stairway to heaven, or to nowhere at all.