The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

Sofia's legislative center is continuously reinventing itself.

A striking symbol of the Bulgarian capital.

"Holy Wisdom" overlooks the city that became its namesake.

This dizzying span over the ancient Algerian city was once the highest suspension bridge in the world.

This massive monument towers over the city as a constant reminder of the lives lost during Algeria's hard-won war for independence.

The oldest funicular in Lithuania has been climbing this steep hill since 1931.

Memorial to the 89 children killed during the NATO bombing of Serbia.

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

This unusual sculpture is sometimes partially, sometimes fully, submerged.

Backwards hour and minute hands and a timing mechanism that fluctuates with the temperature led to this clock tower's local nickname.

The last king of Poland was interred in this church nearly 200 years after his death.

This biographical museum honors the groundbreaking scientist at her birthplace in Warsaw.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

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.

Local folklore claims that this wall was not built for defense, but to provide labor during a time of famine.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

This building's name and a plaque are all that's left of what was probably the most important nightclub of the Madchester music scene.