Abandoned castle was once a grand example of Russian privilege, built exclusively to win a frivolous bet between noblemen.

Ukrainian defense contractor's center for studying "pyramid energy."

A curated museum of wooden sculptures inhabits this Russian home.

The world's first museum dedicated to the work of game-changing naturalist Charles Darwin.

Immortal combat in a Moscow museum.

The "Mystery and Company of Merchant Adventurers" is an Elizabethan-era hangout in Moscow.

Huge concrete structures designed as an early warning system for Britain to detect enemy aircraft.

England's most notorious suicide spot.

A 26-foot shark sculpture—a statement about bombs—set off a municipal battle royale.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

Abstract dinosaur models in London.

Remnants of a Victorian garden feature sitting in public woodland.

Floating pink tap installed for a flower show in London.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

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

A hands-off space for graffiti artists to hone and display their skills.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.