The world's largest wooden structure.

New York City's smallest piece of private property.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

Wonderland replication in progress by one persistent man.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

A private collection of massive steel monsters guarding a Texas pipe works.

Compensation for the destruction of a historic shipyard.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

A bit of retro transportation flair preserved in the world's largest department store.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Michael Jackson got Bad and Crocodile Dundee walked on heads in this iconic Brooklyn subway station.

A modern zoetrope on the New York City subway.

Ride the subways of yesteryear.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.