The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

The largest and most famous wax anatomical collection anywhere in the world.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

The oldest operating pharmacy in the world features 800-year-old recipes.

Contains some of the world's more disturbing wax anatomical models.

The ruins of an abbey believed to have been founded by Charlemagne in the 9th century.

A huge enchanting public park just outside the ancient walls of Rome.

Ancient ruins hidden underneath a modern luxury hotel.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

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

The Pope’s secret escape route.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

Jesus' footprints and the first catacombs in the world.

The final resting place of the poets Shelley and Keats.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

Monument to a suicide protesting the Soviet invasion.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

A Jenga-style cylindrical tower of books that appears to go on forever.

Terrifying derelict military hospital once housed a recuperating Hitler.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.