In Coyoacán, a pair of coyotes crown a public fountain in reference to the ancient Aztec name of the borough.

Inside the cloister of the Temple of San Juan Bautista is a ceiling decorated with gold Baroque illustrations.

Sample sweets at an Art Nouveau candy shop that's been in business since 1874.

Once home to an aristocratic family and a workers' organization, this intricately tiled building now houses a chain restaurant.

This clock was gifted to Mexico as a show of gratitude for its long history of welcoming Arab migrants.

Eternal resting place of the grave robber and murderer who served as inspiration for many of cinema’s famous madmen.

This massive 286,200-tile mosaic was the largest mural of its kind in the United States and is an early example of computer-generated art.

An homage to Jackie Gleason's bus-driving character from 'The Honeymooners.'

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

There are owls with glowing eyes in Herald Square.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

Commemorating the spot where the famous scientist fed his pigeons.

There must be a pun in this haystack somewhere...

Some of the world’s most popular songs came out of this building.

Tucked away amidst some of the most famous addresses in the world is New York’s only fraction of a street.

Hidden on the seventh floor of a historic building, this Cajun spot features wall-to-wall bottles of hot sauce.

One of Ireland's most infamous prisons for rebels including men, women and children.

The modern birthplace of Irish freedom.

A mysterious plaque to the even more mysterious "Fr. Pat Noise," killed in "suspicious circumstances."

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

A stunning example of traditional salt production set against a dramatic volcanic landscape.