A former pyramid-shaped library with colorful murals lies just across the bay from Old San Juan.

This colorful gate stands as an entrance to the walled city of Old San Juan.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

Wander down a side street dedicated to one of the members of the Beat Generation.

A surreal, interdimensional shopping center and portal to another universe by Meow Wolf.

The niches over the western entrance of Westminster Abbey honor individuals from the 20th century who gave their lives for their Christian beliefs.

Once thought to be the fabled Holy Grail, it is now known to be an oil lamp.

An eerie diorama that captures the majestic nature of a few prehistoric-looking beasts.

A terrific purveyor of natural history objects and curios.

The only gallery in New York dedicated to olfactory art and the exploration of scent in art.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

New York's southernmost subway station is whimsically wavy.

The stone sculpture of an Ottoman soldier is an homage to a lost Providence landmark.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This enormous gold Buddha statue was hidden inside a stucco decoy for centuries.

Quotes and poems etched on stone plaques are hidden along this waterfront walkway.

Old 'Nutcracker' sculptures from 'Where the Wild Things Are' author found new life as a seasonal attraction.

This historic hub for labor unions has survived the city's changing landscape.

The Denny Substation has been called "the coolest substation in the world" and sits in a densely populated Seattle neighborhood.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

This Seattle store is packed with all sorts of curious creatures and creations.

The first park built over a freeway is a brutalist masterwork.