This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

The artist and New York City icon lived, worked and died in this converted carriage house owned by another iconic artist, Andy Warhol.

The first piece of public art dedicated to LGBT rights.

Elevated freight railway turned wildly successful urban park.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

There must be a pun in this haystack somewhere...

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

The iconic statue was moved to a new spot overlooking the James river after several years as a mascot for the local baseball team.

A convincing little bit of ancient Egypt smack dab in Richmond, Virginia.

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

A small Richmond island dotted with the remnants of hundreds of years of history.

This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

A beautiful combination of living flora with preserved bones covers the shelves of this shop.

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

This sidewalk tribute honors Colorado's great culinary creation.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The state bird of New Mexico, constructed entirely out of garbage.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Less a museum than a bizarre fantasy world created by artists and engineers.

Berlin's old airport.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The most visited, and possibly most controversial, museum in Germany.