The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

The most visited, and possibly most controversial, museum in Germany.

Believed to be the remains of the lost Temple of Minerva, this nymphaeum has been known by its misnomer to this day.

One of Rome's most picturesque and original bridges was also a popular choice for Grand Tour artists.

Known for centuries as the famous Roman emperor's burial place, this monument is actually something else.

Roman politician Herodes Atticus built this nymphaeum to honor his wife, whom he may have murdered.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

An extraordinary house museum and cabinet of curiosities in the heart of Florence.

Memorials at a Florence railway station remember the citizens who were deported from Italy and sent to extermination camps.

A medieval weapon rumored to have been used by the brilliant poet himself.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

The middle finger of modernity.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

A small and surprising passageway in Saint Petersburg devoted to the Beatles.

A city block packed with whimsical sculptures that seem to be plucked from a tiled fantasy world.

Dark, eerie exhibits make for a surreal exploration of the subconscious.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

Tubing through a cave lit with glowworms is a magical underground experience.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.