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

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

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

One of only two commuter aerial tramways in the United States.

Elevated freight railway turned wildly successful urban park.

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

A museum wholly devoted to juvenescence.

A flourishing garden with pigs, donkeys, goats, rabbits, guinea pigs, chickens, ducks, and sheep.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

Ship-sized kinetic sculptural fantasy.

This one has sailed five times as far as Sir Francis Drake's famous ship.

The Columbia Road Flower Market is now open every Sunday, rain or shine.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

The remains of the great moral philosopher reside in a university in London.

Pop culture has helped to keep this iconic British building from being destroyed.

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

Abstract dinosaur models in London.

Eighty million natural history specimens call this gargantuan museum home.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Catacombs turned marketplace.

The remains of Crystal Palace Great Exhibition of 1851.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.