An alchemist's "magic door" stands in the middle of a Roman park.

These elaborate gothic monuments honor Verona's medieval lords.

This medieval castle was reconstructed by Carlo Scarpa.

Not only does this shop sell mokorotlo, the traditional hat of Lesotho, the building is shaped like one.

A small alleyway with an unusual moniker.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

This column celebrates Rome's victory over the Goths, and may be the oldest Roman monument in Istanbul.

The most metal church of all time was built in record time because of an international, pious pissing contest.

A tiny park in the middle of some big power politics.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A fountain standing as a testament to a doomed alliance.

Not far from the more famous House of Juliet, visitors will find the supposed residence of her lover.

This pyramid is dedicated to all those who suffered martyrdom for civil and religious liberty in Scotland.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

Turkish adventurer antiques in the heart of the Grand Bazaar.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

A spooky juxtaposition of caves and graves gives this legend-filled cemetery a particularly haunting vibe.

When it came to designing his own small office building, the eccentric architect wasn't afraid to show the world what he could do.

A curious urban windmill once owned by a renowned British mathematical physicist.

When the public was consulted about a new piece of street art, they naturally asked for an enormous metal dragon.