The city’s oldest gateway to the galaxy lies at the entrance to the Royal Botanical Gardens.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

Some of the clearest water anywhere in the world.

Sleep in a glass pod dangling off a cliff.

A beautiful little bookshop located in the middle of a desert.

This lake’s emerald green waters are a spectacular sight, but it’s not a great place for a swim.

The humble tomb of an Argentine general, hand-built by his son using stones brought down from the Andes.

A journey through a collection of classic cars and fashionable artwork.

This modern New Zealand attraction honors ancient forms of astronomy and scientific understanding.

Home to some of the world’s darkest skies, this project blends ancient Māori culture with world-class astro tourism.

This aluminum “stairway to heaven” has impaled at least a couple of birds.

This demon atop the Notre-Dame de Paris looks utterly bored.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

An incredibly well-preserved piece of ninth-century Viking poop.

The little-known second castle that William the Conqueror built in York.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

A Christian monastery stands on what was once a holy Incan temple.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

An Inca spa, military outpost or maybe… both?

The 19th-century vessel floats proudly on Lake Titicaca, but its journey from Britain to the Peruvian altiplano was far from smooth sailing.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.