One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

Largest necropolis in the Mediterranean.

The walls and streets of the ancient city are peppered with penises.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

A sulfuric hellscape in southern Italy.

Ancient snack bar of the Roman Empire re-opened.

Erotic art covers the walls of the largest ancient pleasure palace.

The Pope’s secret escape route.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

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

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

A naturally mummified 2,000-year-old man.

Eighty million natural history specimens call this gargantuan museum home.

This clifftop arch is a natural stunner.

The glowing blue Nymphaeum of Emperor Tiberius.

The Emperor Tiberius' palace of debauchery.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

This stunning concert hall has become a symbol of Iceland's national recovery.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.