A prehistoric geological oddity tucked behind Stockholm's natural history museum.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

The commemorative stone column conceals a secret laboratory.

An "evil painter" included pointed symbols in this artwork to poke fun at members of the Danish Parliament.

Look closely, and you'll see this rusty man is crying.

A tiny village is home to the world's only diner completely devoted to the many varieties of traditional Swedish dumplings.

Site of the first radio and telephone broadcasting companies in Copenhagen.

One of the largest legal spray spots in Hamburg.

The biblical sculpture honors those who lost their lives, homes and communities to the Chernobyl disaster.

An Elvis superfan built Denmark's own version of Graceland.

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

This museum is a portal to 20th-century Denmark.

Walking through this narrow gorge will make you feel like you've fallen into a fairytale landscape.

A memorial to the beloved brown bear that served in the Polish army during World War II.

Located in an old church, this brewery produces a different kind of holy water.

This massive monument was unveiled the day Kosovo declared independence from Serbia.

Known as the "Valley of the Moon," this Jordanian wadi is one of the most amazing desertscapes on Earth.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

A lush oasis full of vibrant plants and striking geometric displays.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

This legendary dessert was served to Nobel laureates for decades.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.