A rotting tree in the middle of Seattle doubles as an elaborately-controlled art piece.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.

A wall of chewing gum moonlights as collective art.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

A walk through the historic city center, under the streets of Seattle.

This working class sculpture pounds his hammer all the livelong day.

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

A colorful architectural gem in Seattle's uniquely modern Central Library.

Mountain where Jesus was first tempted by the Devil.

A beautiful but toxic fountain of mercury.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

A beer pipeline runs beneath Bruges.

Christ's blood preserved in a Belgian town.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

Rotterdammers' dirty minds gave this santa a dirty nickname and cursed it to a life of wandering.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.