The next-door homes of two very different musicians, George Frideric Handel and Jimi Hendrix.

At almost 1,000 years old, this is the oldest known door in all of Britain.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

This iconic high-rise residential block was one of the last to be built in the Brutalist style.

The fences outside some of South London's estates are made from recycled World War II stretchers.

The broken skateboards that became a poignant memorial to a murdered skater.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

This banal Parisian entranceway is not what it seems.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

Abandoned railway line circling the city of Paris.

The youngest volcano in Central America.

Located in the mountains of Nicaragua, one man has spent most of life beautifying a massive cliff by hand.

Only gap in the 30,000-mile span of roads called the Pan-American Highway.

Disused penal colony features prisoner artwork, some sketched in human blood.

A secret climbing tree hides along the side of a Costa Rican road.

A series of abstract sculptures pop up from an otherworldly volcanic landscape.

At the center of an island in the middle of the Indian Ocean is a deep chasm ringed by tall waterfalls.

There is one corporation registered for every three square feet of space in this inconspicuous office building.

The meteor that sealed the fate of the dinosaurs landed at this site, one of the largest impact craters in the world.

Cave where bat-eating snakes hang down from the ceiling.

A fantastical group of cliffside stairways, bridges, and twisting paths carved out of stone provide a surreal coastal hike.