This unreal Portuguese palace looks as though it's made from a pile of different castles.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

One of the largest Roman settlements in Portugal.

This garden among the Florentine hills is complete with a meditation path and works of poetry.

This museum is rotten with a century of wax medical deformities.

The mummified relic of St. Antoninus.

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

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

A wunderkammer of curious objects and intriguing art nestled within a hub of ancient Roman sites.

An alchemist's "magic door" stands in the middle of a Roman park.

The largest and most famous wax anatomical collection anywhere in the world.

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

The middle finger of modernity.

An incredible menagerie of more than 3 million taxidermied animals at the oldest science museum in Europe.

Sweden's southernmost prehistoric rock art is hidden just outside Gothenburg.

One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.

Hidden in a Scotland museum is a copse of extinct tree stumps.

A 200-year-old collection of oddities and medical paraphernalia.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

Sound travels strangely in this underground whispering gallery.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

A king's bloodstained shirt is among the gruesome collection of artifacts displayed below Stockholm's Royal Palace.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.