Commonly acknowledged as the only public monument to the Devil himself.

A lush indoor jungle fills this bustling Madrid transportation hub.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An abandoned shopping gallery built during Fascist Italy tucked in the center of Palermo.

Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

This skeletal, unfinished Gothic church once housed a miraculous masterpiece by Raphael.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

Deceased nuns were placed on stone chairs to decompose, while the surviving nuns prayed near the lifeless bodies.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

Buy your fish and have it cooked to order in this bustling, eight-floor seafood market.

The world's longest bridge fountain has hundreds of nozzles that create a beautiful, illuminated spectacle.

The burial ground of two kings and a queen is now a calm city park in the middle of bustling Seoul.

A room filled with frescos that make it seem like the walls are crumbling down while giants die in despair.

This enormous monument is one of the most iconic structures in Tokyo, rudely nicknamed "The Golden Turd."

The ruins of this medieval castle overlook the lake of Piediluco in what was once a sacred forest.

Naturally preserved bodies are eerily staged throughout the crypt in varying poses.

This medieval mountain town is also known as the "Village of Streams."

San Gennaro, the patron saint of Naples, greets pedestrians between these narrow city streets.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.