Sculptor Antony Gormley used chaos theory and fractal growth to design his tallest creation.

Where Aleister Crowley attempted to seize the Hermetic Order of the Golden Dawn in a mask and a kilt.

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.

Classic game cookery takes center stage at what's widely considered London's oldest restaurant.

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

This home on a quiet suburban street is completely covered with vibrant mosaics.

A mysterious artist-run cabinet of curiosities and library.

Feral cats keeping the rodent population at bay all across Greenpoint waterfront.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

This small, hidden cove is home to abandoned boats.

Thriving meadows span a rooftop in one of Brooklyn's most heavily industrialized neighborhoods.

This neighborhood grocery houses a treasure trove of Eastern European delights.

Check out the underground party scene at the "Burning Man of Brooklyn."

This interactive gallery makes you feel like you've stepped into a fantasy world filled with whimsical monsters.

Sniff the Titan Arum's rotting flesh.

A Parisian boutique devoted to la Sape, the elegant Congolese fashion subculture rooted in European colonization.

Weird wax anatomical models reside here, as do other anatomical specimens.

The site where two doves fell in love.

The tombstone of an unfortunate explorer who disappeared in the Paris Catacombs.

This small, ingenious cannon once helped regulate Parisian life.

During the summer months, giant teddy bears take over Paris near Les Gobelins metro station.

This innocuous-seeming building is actually the remnant of a major wartime brothel.

Skeletons, medical artifacts, and other obscure and precious treasures all displayed in a wooden pharmacist's cabinet.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.