A beautifully eclectic mix of architectural styles.

The attic of a four-century-old canal house hides a clandestine church.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

An ancient Egyptian temple in the middle of Madrid, Spain.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

France's most famous cemetery, with some of its most curious tombs.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

Gargantuan home of Russian science.

Moscow's imposing monument to the Space Age.

World's largest bell sits on the grounds of the Kremlin in Moscow.

Former headquarters of the KGB.

The tallest hotel in Europe.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This one-time health resort was used by aristocrats around the world.

This abandoned Slovenian military barracks has become a punky-political art squat.

Bridge that died in war and was resurected.

Oriental bazaar in the heart of Sarajevo.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

This ironic war memorial thumbs its nose at a campaign of inedible humanitarian aid food products.

This museum preserves the hand-dug tunnel that kept Sarajevo afloat during the Serbian siege.