Soak in the life’s work of one of the country’s foremost modern artists.

A pharmacy built in the shape of a mortar and pestle, now resembles a fancy cocktail.

Curios, scientific antiques, oddities for sale.

This is the oldest Roman-made bridge in the city still existing in its original state.

The ruins of this temple were later chosen by Pope Celestine V to found an abbey and a hermitage.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

In the hinterlands of Serbia's capital, a giant reflective mushroom houses an aeronautical history of the former Yugoslav republic.

An autonomous republic of Orthodox monks.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

When this funny little building went up in the 19th century, most people thought it would simply fall over.

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

Founded in 670, this ancient mosque is an architectural time portal.

Serbia's master of striking memorials erected a forgotten, hidden gem in the hills outside a tiny village.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

In the midst of a living monument to Soviet social engineering, Polish Catholics built this church by hand.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.