The mummified relic of St. Catherine sits forever on a golden throne.

This delightful little museum is dedicated to only one thing: pasta.

A sunken idol welcomes parishioners to Davy Jones' Locker.

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

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

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

Stalactites and stalagmites in a beautifully lit cave.

Architectureal fantasy quarter of Rome.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This zoological museum began as the first great curiosity cabinet.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

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

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

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

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

A striking memorial recalls thousands of Bolognese men and women killed fighting fascists in World War II.

A full figure 4th century incorruptible saint lies in a glass coffin in Croatia.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

Australian Lake set aglow by Noctiluca Scintillans.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

A submerged village appears when dam levels drop.