Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

This small Bavarian graveyard is filled with empty graves for German soldiers lost during the World Wars.

Soaring over 6,000 feet in the Bavarian Alps, this beer garden was once Hitler's 50th birthday present.

A fearsome dragon clings to a corner of Munich's city hall.

The footprint of a frustrated devil in Munich's Cathedral.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

The patron saint of spinsters grasps a container of dried blood.

A stairway to heaven, or to nowhere at all.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A Spanish forest is filled with mysterious stone carvings.

Extraordinary sculpture garden created by an eccentric English poet.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

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

Spanning an elevation of 160 feet and containing 388 steps, this is Seattle's longest staircase.

Another entry into the world of Edinburgh's pop-up artworks.

A series of three shiny letters mark the boundary of an old refuge for those being pursued by debt collectors.

A poetic monument to the Scottish Parliament.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

This extraordinary Viking artifact has traveled throughout the city.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

The Scottish Reformation leader's grave was paved over and is now a parking lot.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

An artist's whimsical transformation of everyday objects.