Places Jan Claus Di Blasio Wants to Go

Dedicated to a young woman who broke gender barriers at the University of Madrid.

These abandoned country fairgrounds are filled with replicas of Spanish monuments.

Stuck in the middle of a modern Madrid city block are the remains of a 19th century sports complex.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

This lucky bronze frog was gifted to Madrid by a casino.

Madrid's last horchata kiosk is a blue-and-white beacon of refreshment.

This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

A unique collection of Swiss art brut and naïve art displayed in an old warehouse.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

Legend has it fairies gathered at the site of this medieval castle.

Festival of Perpetual Life and Rebirth.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

This former estate of a fascist leader is now a burnt out ruin leading to a system of secret tunnels.

It’s said this crypt was the setting for the tragic finale of the Shakespeare play.

Not far from the more famous House of Juliet, visitors will find the supposed residence of her lover.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

Among the collection is the shirt worn by Louis XVI when he was executed by guillotine, still marked by a few drops of blood.

A submerged archeological park still holds the wonders of a Roman Sodom.

A grand Yugoslav memorial to the group of partisans who fought and died resisting western Serbia’s Nazi occupation.

This historical village takes you back to the 19th century.

The ceiling of this cavern is dripping with multicolored marble stalactites.

What happens when you cross a mayor and a painter?

Though they've since been renamed, these two streets hint at Dublin's darker days.

Rome is now home to a stunning food museum and library.