The site of the first battle of World War II.

A World War II torpedo launch station abandoned off the Polish coast.

A haunting deserted hotel is a favorite with artists and photographers.

This medieval city gate is now a blend of the past and the modern world.

A popular legend claims that the famous pizza was invented at a restaurant in this alley.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

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

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The yawning maw of this pagan visage is said to bite off the hands of liars.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

This tremendous timepiece was once the largest cuckoo clock in the world.

A historic casino where Dostoyevsky is said to have lost it all on a single spin of the roulette wheel.

This 13th century Gothic brick castle is the largest in the world by surface area.

While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.

The oldest Jewish cemetery in Europe survived Hitler's Germany.

It's good luck to be mocked by this monkey.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

This former steel and coal plant is now a neon-lit industrial fantasia.

Be on the lookout for the symbolic insect all over the city.