The world's oldest bookshop still in operation.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

When the rain falls, this drain system turns into a musical instrument.

Giant stone letters dedicated to the founder of Armenia's alphabet.

Unusual building appears to be haphazardly built from randomly piled bricks.

Luxury hotel turned into a refugee camp, then turned back into a luxury hotel.

This contentious squat has stood through fire, violence, and government intervention as a hotbed of leftist protest.

Twisted buildings adorn the banks of the Rhine river.

Ruins of a German Castle on top of a towering stone pillar.

This small exhibition displays equipment and artifacts once belonging to the feared Stasi secret police.

Apartment complexes built into huge repurposed natural gas tanks.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

An exquisite Baroque church in Vienna's old town.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Museum devoted to the artificial language of Esperanto.

Handsomely crafted representations of our round planet.

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

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

A unique hotel for the artistic soul.

An open air haven for tropical monkeys in the damp moors of the English country.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

Each year a new straw behemoth is born.