This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

A curious collection of mechanical moving figures.

This observatory within Europe's first dark sky park offers stunning views of the night sky.

This modern labyrinth lies in the shadow of a ruined medieval castle.

A familiar otherworldly creature guards this 12th-century Scottish abbey.

This stately estate house features a tower covered in a bright, modern mural.

A book bound in the skin of an infamous criminal, along with countless other specimens.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

A half-mile-long stretch of medieval forts built after a devastating pirate attack persists amid the modern port city.

The Grand Lodge of Ireland is one of the oldest in the world, full of fantastical, elaborately themed rooms.

This grubby wall is said to be one of the Earth's esoteric energy centers.

The final resting place to 300 Victorian-era pets hides inside the city park.

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

A tongue-in-cheek arcade where the games are based on everyday life.

A kaleidoscopic warehouse-maze of handmade neon signs.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

A semi-scholarly approach to sex.

Try not to get slimed in Tribeca.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.