A castle built by an eccentric medieval enthusiast in rural Ohio.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

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

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

A curious collection dedicated to human and animal anatomy and pathology.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

The magical, mossy forest that inspired Princess Mononoke.

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

Read a book next to a Midtown waterfall.

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

The world's largest collection of witchcraft regalia.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

An exquisite tunnel of cascading flowers.

A magical place that lets you play in and explore the world of Studio Ghibli.

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

Taxidermy and miniatures come together to create this unique museum.

This quaint stretch of road is the final resting place for hundreds of America's four-legged veterans.

The plants form a living library and laboratory for researchers and students at Michigan State University.

These gardens recreate unique and endangered Michigan habitats.

The park is home to the United States's only still-operating Dutch windmill.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

This enchanting forest trail leads to ethereal abodes and a giant bird's nest.