The secret medieval communication system will whisk your words above the noise of the crowd.

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.

A Milanese café entirely designed by the American director Wes Anderson.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

In the midst of a living monument to Soviet social engineering, Polish Catholics built this church by hand.

There are thousands of tributes and memorials to the King, but none quite like this one in a Kraków city park.

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

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

This man-made mound monument was built out of soil from all across the Polish empire.

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

Real bones which are said to have belonged to a Polish dragon.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

A pair of gigantic baby heads greet passengers at Atocha Station.

Guitarist Paco de Lucía overlooks travelers as they pass through this train station dedicated to his legacy.

A model solar system adds a celestial touch to this suburban park.

This postmodern apartment block was designed to be a vertical neighborhood.

Just like in Hollywood, Madrid has also a forgotten walk of fame.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

The morbid items in this small and hidden museum are not for the weak stomached.