Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

This abandoned Brutalist treehouse is a hidden architectural relic.

An incredible menagerie of more than 3 million taxidermied animals at the oldest science museum in Europe.

This magical-looking island is notorious for the misfortunes suffered by its owners.

One of seven Jewish catacombs in Rome and one of only two open to the public.

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

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

One of the most important yet well-hidden museums dedicated to the history of medicine.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

A forgotten "city of water" underneath the famous Trevi district.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

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

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

Jesus' footprints and the first catacombs in the world.

Geothermal waterfalls in Tuscany.

Thousands of well-dressed mummies below a monastery.

Renaissance villa and gardens complete with a tormented colossus.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

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

Rows of 19th-century brick ovens used to process coal into coke form the center of a wooded park.

The overgrown remains of an old rail bridge rise above the valley like ancient Greek ruins.

Built by an accountant with a dream of running a grand resort, this estate has sat vacant for over half a century.