This massive blockhead sculpture hides an entire library.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

This statue of the great Argentinian car driver is located near a famous curve of the Monaco Grand Prix.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

A spectacular Petrine Baroque summer palace commissioned for Catherine I by Peter the Great.

Come face to face with the ferocious visage of the serpent-headed mother goddess of the Aztecs.

This 23-foot-tall bear stands amid the hustle and bustle of Hamad International Airport.

This former farm In northern Iceland is now a museum, where visitors can tour beautifully-preserved turf houses.

This 15th century pharmacy displays a beautiful collection of ancient medicine jars.

This tiny river island switches sovereignty every six months as part of a rare, centuries-old agreement.

This 19th-century fountain's namesake animal isn't what you think it is.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

The site of a legendary battle immortalized in medieval literature.

The Guardian of Tallinn.

An iconic Soviet statue of working-class people.

A large measuring stick marks the lowest point of a country that is partially under sea level.

The "Black Arch" guards the entrance to the picturesque Glens of Antrim.

These coffin-like Brutalist balconies were inspired by a nearby mine.

An 11th-century runestone decorates the halls of Terminal 2 of this Scandinavian travel hub.

An icon of International Style architecture on the outskirts of Rotterdam.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

This unique building in the main square stands out among the city's typically Baroque architecture.

On an island south of Iceland, a large volcanic rock formation resembles an elephant.