Featured in one of the most iconic scenes in cinema history.

This World War II airfield enjoys a second life as a public park.

The Great Fire of London and the regulation of one-way streets both started in this alley.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

Remnants of the city's Soviet history hover over this modern fast-food outlet.

The world's first combination ski slope and power plant.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

This innocuous-looking button may have been used to assassinate a king.

Berliners converted a bombed-out, disused lot into a community-run urban farm with its own cafe and bar.

A local student's chance encounter with Keith Haring led to the creation of one of Europe's largest murals.

Kyiv's answer to Muscle Beach is a Soviet-era gym made from scrap metal.

This declassified Cold War bunker hosts a large collection of Swedish aircraft.

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.

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.