This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

The medieval legend behind this holy well was one of the inspirations behind "Alice's Adventures in Wonderland."

Eyam took steps to quarantine themselves and keep the plague from spreading.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

The oldest church in Serbia was also the ecclesiastical seat of the region during the Middle Ages.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

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

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This gravestone and its inscription inspired a movement that has spanned generations and saved countless lives.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

A replica of the home of a famous fictional troll family.

A railway bridge leading nowhere stands lonely in the middle of a meadow.

Abandoned bridge hidden deep in the San Gabriel Mountains.

This Kyoto Starbucks takes coffee drinkers back in time.

The most beautiful Taco Bell in the world even has surfboard parking.

This century-old cinema is complete with musical interludes and boasts a rare projection system.

The 2,000-year-old pieces of metal are an ancient soldier's military discharge papers.

This residential door allows San Francisco muggles a glimpse at the wizarding world.

A three-table eatery sits inside the home-kitchen of a seafood virtuoso in Bangkok's Chinatown.

Its frescoes depict the likeness of Marshal Tito, Karl Marx, and Friedrich Engels burning in hell.

This hill is known for its connection to the occult in Slavic tradition.

Finally, you don't have to be a pious Swedish seaman to relax like one.

Known as the "Hobbit Houses," these storybook homes look like they're straight out of the Shire.