Moss and stone turn this waterfall into an otherworldly liquid veil.

An ancient Thracian city where fire rituals were practiced on the largest cult altar in Southeast Europe.

The ceiling of Prohodna Cave in northern Bulgaria affords a peek at the sky via two deity-sized-eye-shaped holes.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

An alien church provides much needed silence in the midst of a Finland shopping center.

A small island dotted with old, historic Finnish buildings.

This insurance company building reminds customers that witches, bears, and gnomes are out there, best be insured.

The tiny, studious rodents greet visitors to the National Archives of Finland.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

A collection of collections ranging from dentistry to minerals.

A lovingly curated curio shop in which the taxidermy wear newspaper party hats, and peanut shells are spread across every surface.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

The beautiful non-repeating pattern honors the Oxford professor who discovered it.

This centuries-old pub boasts a collection of more than 4,500 snippets of neckties from around the world.

Once one of the largest rooms full of books in the world, this bookstore basement is still a treat for bibliophiles.

The fantastic charm of England's oldest botanical garden has made it a place of writerly inspiration for centuries.

Used as an example in one of the first dictionary entries for "museum" in 1706.

Oxford University's stateliest library seems designed to make students truly feel the weight of knowledge.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

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

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

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