An atmospheric, medieval-themed book store hides in a 13th-century underground space.

This seaside Scottish holiday rental lets you live out your bookselling dreams.

Above an abandoned Underground station, this charming bookstore is home to strange antiquities and literary works.

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

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

Cat art as far as the eye can see.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

A short distance from the Eiffel Tower is the final resting place of several of the city’s more well-known and interesting characters.

There has been an astronomical clock on this spot since the 14th century.

A museum of magic with a Sadist past.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

The largest crypt ever constructed in France was built in the 11th century on an ancient Druid sacred site.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

The largest underground church in Europe.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

The history of radiation is on safe display at the foot of a radiation science laboratory.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

France's most famous cemetery, with some of its most curious tombs.