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

A network of underground water channels that dates back to the Middle Ages.

Cave shrine on Monte Pellegrino.

Thousands of well-dressed mummies below a monastery.

A site of pagan worship which still attracts people looking for fairies.

More stones than Stonehenge, all scattered within a windswept landscape sure to enchant 'Outlander' fans.

Museum dedicated to "the man who moved the Earth."

Crosses of all shapes, sizes and colors litter the mountain, the site of a huge yearly Orthodox pilgrimage.

A somber memorial honors the hundreds of thousands of lives lost at this labor and extermination camp.

A hidden art gallery in an abandoned Warsaw fort.

This biographical museum honors the groundbreaking scientist at her birthplace in Warsaw.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

A tree planted by Marie Curie is treasured by the Radium institute that she set up.

One of the world's largest collections of medieval religious art.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

This historic black and white monastery is one of Bulgaria's architectural jewels.

Edoras, capital city of Rohan in Lord of the Rings, once sat atop this isolated New Zealand mountain.

The names Lúthien and Beren can be found inscribed on the shared grave of the famous writer and his beloved wife and muse.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

This species of wild goat stars in witchy legends and frolics among the park's eerie rock formations.

Earth's rocky history has rarely glittered so brightly as it does in this Spanish museum.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

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