These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

The burial grounds of a secret society includes fences topped with fake Tesla balls.

A collection of fading fantasy tchotchkes lines this dirt road in the Colorado wilderness.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This sidewalk tribute honors Colorado's great culinary creation.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

Ice cream stand, snack bar, and time capsule of milk conveyance.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

A large instrument played by the wind.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

The remnants of the base where US Army troops learned how to fight in extreme conditions.

A wall of chewing gum moonlights as collective art.

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

Birdhouses, peacocks, animal sculptures, and a graveyard are all found along this eclectic nature trail.

Rare and gorgeous birds abound in this protected wildlife sanctuary.

A modest reminder of treacherous waters at the Golden Gate.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

These WWII-era murals were initially booed as a libelous portrayal of the American dream but have survived multiple attempts to have them destroyed.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.