Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

This luxury shopping lane has been protected by its own tiny police force for over a century.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

A 1950s beatnik coffee house, turned 60s counterculture hotspot, turned modern music venue.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

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

The most confusing clock in New York.

A popular European tradition makes its way to the states on one of America's most famous bridges.

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

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

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.

Cheap pizza and all of your naughty bedroom needs housed in a stunning example of Art Nouveau architecture.

A strip of modern stores in historic buildings.

“Invented in Key West, Perfected in Brooklyn."

One of the largest public housing complexes in New York once visited by Eleanor Roosevelt.