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

A little slice of Japan and its aesthetics in London's Holland Park.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.

This hidden green space is the city's second largest conservatory.

A tribute to all the green-thumbed workers who tend London’s public parks and gardens.

A secluded green oasis amidst the towering skyscrapers, bears an unusual moniker that reflects one of the city's oldest guilds.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

This bridge was constructed from the rubble of the infamous Bastille.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

Rebuilt remains of a temple to Roman god Mithras.

A quiet memorial to those who died saving others in the heart of the City of London.

This crumbling 14th century chapel became so unstable the roofing apparently collapsed during a wedding ceremony, narrowly missing the curate's head.

Abandoned power station once home to a squatter community, now being developed into an arts center.

The loneliest island in New York.

The famous author's cottage hideaway.

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

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

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