Romans built the world's tallest artificial waterfall in 271 BC.

This abandoned Brutalist treehouse is a hidden architectural relic.

This Tuscan lake hides a 13th century town that is still visible when the water recedes.

Natural cathedral designed by Italian artist Giuliano Mauri.

Crushed coral and crystals give the sand its signature coloration.

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

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

The final resting place of the poets Shelley and Keats.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

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

A 16th-century horror show built in a lovely Italian garden.