A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

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

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

This massive library holds what was once the largest book collection in the world.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

Eighty million natural history specimens call this gargantuan museum home.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Visitors can explore the role of mysticism throughout the ages inside this interactive museum of magic.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

A wunderkammer of mysterious objects and stories.

Started as a kitchen garden, now the second largest botanical garden in the world.

Occupied for six centuries by Franciscan Order nuns, this monastery is an amazing ode to Catalán Gothic architecture.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

This semi-secret storybook hedge maze is also the oldest garden in the city.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.