An exercise in radical design and social living that became the epicenter of Soviet spy networks in London.

Decrepit Victorian public lift is a white-knuckle ride.

The elegant structure of this 19th century railroad bridge creates an illusion of infinity.

Once the site of a 12-century monastery, this tiny island is now home to only five permanent residents.

The final resting place of the controversial chess champion.

A winding, blood-red tunnel of hardened lava navigable by foot.

A trio of hidden hot tubs takes advantage of Iceland's natural geothermal vents.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

A comic book store that puts the marvel back in marvellous.

This sculpture, residing in a quiet corner of a London park, honors the victims of 9/11.

A domino effect created with Britain’s iconic telephone boxes.

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

The famous polar explorer stands outside the Royal Geographical Society's headquarters.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

A special train service transported Sydney's dead from this station to "Necropolis Receiving Houses" at Rookwood Cemetery.

Decommissioned experimental solar facilities that pioneered solar energy technology.

A black and white painted wall creates an optical illusion in the California desert.

Centuries of biking history are nestled in the shadow of the birthplace of contemporary mountain biking.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

340 bicycles, 65 feet high.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.