A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Macabre astrological automaton clock dating to the late 1400s.

An 18th century fountain and two columns are all that remains of Rome's forgotten river harbor.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A constellation of golden cobblestones shows the names of local children born under a full moon.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

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

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

A little sculpture with a large wardrobe.

Christ's blood preserved in a Belgian town.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

The final resting place of more than 200,000 people, this is one of the largest cemeteries in Europe.

This extensive collection covers thousands of years of Polish military history.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.