This innocent-looking townhome is actually a subway exit.

Some charming, but sadly, unloved animal statues call this park home.

A grand entrance to one of the world's smallest Chinatowns.

The official Presidential Residence of Los Pinos became an emblem of Mexico's opulence and presidential corruption.

The unique collection often goes unnoticed by visitors focused only on the archaeological objects.

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

This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.

Part bookstore, part café, and part forest.

A colorful "forest" made entirely from three tons of recycled plastic waste.

The only castle in North America to ever house European sovereigns.

Diego Rivera's massive tiled fountain and failed infrastructure project.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

The house that birthed The Old Man and The Sea is now a museum devoted to the old man who wrote it.

One part antique store, one part curiosities hodge-podge.

The home of aviation trailblazers, in a remote corner of the big city.

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

One of only two remaining Victorian-era greenhouses in New York.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

A modern zoetrope on the New York City subway.

Sniff the Titan Arum's rotting flesh.

Detailed facade of a brownstone in Boerum Hill.

Ride the subways of yesteryear.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.