This rooftop sign has been confusing Milwaukee-bound airline passengers for decades.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

The narrowest street in Paris.

This demon atop the Notre-Dame de Paris looks utterly bored.

The oldest certified bowling alley in the United States is in the basement of this century-old bar.

A wonderfully curated used bookstore in an airport.

A place to eat for on-the-run agents and espionage enthusiasts.

Statue dedicated to the star of an old television show.

Once a speakeasy operated by Al Capone, this Milwaukee cigar bar is now a haven for ghost hunters.

This striking art museum holds an amazing series of curiosity cabinets.

A unique botanical garden housed in three giant geodesic domes.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

What appears to be a wizard's lair in Milwaukee actually houses a massive water pipe.

According to the legend, this strikingly beautiful hill has miraculous healing powers.

One of Frank Lloyd Wright's final works was this UFO church.

The mall's looks were inspired by the cowboy extras who used to meet up—and cause real trouble—at this Hollywood hub.

A few iconic structures are all that remain of America’s first outdoor shopping mall.

The Hollywood home of Kermit the Frog and Yoda used to be Charlie Chaplin's film studio.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

The private clubhouse for the members of the Academy of Magical Arts.

This Hollywood dive houses a mural painted by the artists who animated its namesake film.

This star-studded Old Hollywood restaurant is where fettuccine Alfredo made its United States debut.

This bank is widely believed to be the inspiration for the offices of Philip Marlowe, the hardboiled detective featured in a number of Raymond Chandler's stories.

A prohibition-style speakeasy takes up residence in the last Victorian residence in Hollywood.