This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

The largest of London's subterranean rivers and once a mad, bad center of London life.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

Fake subway tiles were installed to cover a design that resembled the Confederate flag—it's unclear if the resemblance was intentional.

The first piece of public art dedicated to LGBT rights.

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

A normal, unassuming pedestrian overpass has been the demise of many, many trucks.

The longest and widest floating bridge in the world.

The first park built over a freeway is a brutalist masterwork.

A wall of chewing gum moonlights as collective art.

This 1776 beacon on the coast of Wales is said to have a ghost called Raymond, the last lighthouse keeper.

Giant statue of a disembodied head.

Final resting place of John Middleton "The Childe of Hale."

The western face was supposedly left clock-less to snub the Welsh.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

A geological wonder shrouded in myth.

The highest point on the island known for buildings that touch the sky.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

Seriously good slices of Sicilian pizza lurk at the back of the Bronx's oldest enclosed market.

The mosaic Star of David at the front of this store hints that it's no ordinary Italian grocer.

An artist's cute bronze subway sculptures belie his violent artistic past.

A trove of century-old litho stones from the Puck Building's printing days were discovered behind a cellar wall, and are now hanging in the store.