A facility built in 1992 for an underground nuclear test remains in place today.

The only subway station in the city that still makes use of gap fillers.

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

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

On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

The final resting place of soldiers' loyal canine companions.

A 18th century graveyard and its astonishing cortege of macabre iconography.

Inspired by Thomas Stothard's painting of the "Journey to Canterbury," albeit with Canterbury natives.

This skewed English house has looked like it's going to fall over for centuries.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

France's most famous cemetery, with some of its most curious tombs.

The mirrored section takes the shape of Hebrew characters when viewed from above.

This cheese shop also houses a museum devoted to Dutch dairy.

Named after a Mexican president, who once lived nearby, this park in a residential Mexico City neighborhood packs a whole lot of history into a small space.

In Chapultepec Park there is a pavilion gifted to Mexico from South Korea to honor the 1968 Summer Olympics.

The turquoise-studded skull of a long-dead Aztec man sits within Mexico City’s Museum of Anthropology.

This colossal ancient jaguar sculpture was used as a vessel for the hearts torn from sacrificial victims.

Diego Rivera hid various people and symbols in his first large-scale mural project.

This "City of Books" holds a museum, library, and the complete personal book collections of five of Mexico's greatest thinkers.

A small pack of an ancient, hairless breed of dog once believed to guide souls through the underworld lives on its grounds.

A collection of heirloom roses tucked in a spectacularly beautiful botanical garden on Lake Atitlan.