These overlooked ruins give an intimate look at the Inca Empire's urban planning prowess.

The world's northernmost brewery uses water from a 2,000-year-old glacier to create its beer.

This early version of the guillotine was used to execute the man responsible for its construction.

In Hong Kong, a fairytale flower tunnel is hidden within the gardens of a public housing complex.

A 19th-century architectural wonder designed by the "father of the skyscraper."

Norway has built what may be the world's most beautiful public toilet.

A tribute to the women who quietly kept the local steelworks alive during both world wars.

The smallest port in France is named after the pirate who created it.

A beautiful lighthouse with as many steps as days in the year, as many windows as weeks, and as many levels as months.

A giant repository of accidentally discovered cave paintings up to 30,000 years old.

One of the foremost Sherlock Holmes collections is hidden away at a Toronto library.

One of the world’s largest and deepest freshwater springs, where mastodons once roamed.

Wading through a small lagoon reveals a secret, wild stretch of pristine beach.

An ancient city hidden in the heart of the Sierra Nevada mountains.

Dubbed the "Blade Runner dragon," this buzzing neon sign is a beloved local icon.

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

A collection of abandoned typographic signs from Berlin and beyond.

At high tide this strange footbridge appears to have no purpose whatsoever.

The world's first hotel built in an abandoned water-filled quarry.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

Follow the original medieval paths that wind through this intriguing section of the city.

An old spiral fire escape dangles above a public courtyard in Midtown Oklahoma City.

This tiny island is home to the world's largest colony of Northern gannets.

England's largest white horse isn't even white.