Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

A huge railroad museum with over 100 pieces of rolling stock focusing on the railroad history of Pennsylvania.

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

An outlandish shoe shaped house built by an eccentric millionaire.

One of the few remaining covered bridges in Lancaster County.

The oldest farmer's market in America is so ancient it was approved by the King of England.

A singular collection of hand-built art deco cars are held in a building with style to match.

A small collection of magic tricks and memorabilia is now an apartment-sized museum.

The last fully functional fortress of Germany's World War II Atlantikwall.

Norway's chilly all ice-instrument festival.

This unlikely 1980s relic at a bus station recalls the New York real estate tycoon before his political career.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

Europe’s oldest natural human mummy.

This airport currywurst stand is made out of retro airplane parts.

Go surfing on this urban wave, "hacked" by local surfers.

The bells remain in a shattered heap exactly as they fell when the church was bombed in World War II.

The small alleys in Lübeck's Old Town are a result of medieval urban sprawl.

This monument to those fallen in the World Wars is accompanied by a U-boat that Germany bought for a Deutsche Mark.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

Model Trains and Much More in Hamburg.

A stunning gilt bronze relief denounced by Hitler as "degenerate art"—even though it was dedicated to the Nazi leader.

Constructed by forced laborers, this submarine pen is now a museum and war memorial.