This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

A massive, gleaming sea turtle with a rider atop its shell looks out over the horizon.

This Greek temple, open only an hour a day, was the site of a war of tastes between an architect and an artist.

One of the deepest indoor swimming pools in the world.

A rare example of World War I trenches from the British front.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

Hiding the longest subterranean river known in the world.

Meet the bronze beloved pet to a family of famous peeing statues.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

In Rome’s Jewish ghetto, a 200-year-old bakery still makes the neighborhood’s historic sweets.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The house where a Danish physicist discovered the connection between electricity and magnetism.

Over 9,000 brains collected between 1945 and 1982 demonstrate the results of untreated mental illness.

It might look like just a pile of sticks—because it is. But there's a dark history to how this stack got its start.

A natural wonder in south Denmark.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Hans Christian Andersen for the postmodern world.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.