Children's literature inside, forest all around.

A Spanish forest is filled with mysterious stone carvings.

The oldest library in Scotland was built from the remains of a church to hold a churchman's library.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

This unusual rock looks like a giant, otherworldly mushroom sprouting atop a cave.

The mystery of this small, brick pond eluded its possibly only investigator until his death.

The farthest northwesterly point of the British mainland is one of the most remote places in the Scottish Highlands.

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.

This temple was constructed entirely by Roman soldiers.

The world's spiciest ice cream comes from Glasgow.

The last fully working Victorian Turkish bath in England.

The only residents of this abandoned housing development full of identical castles are stray cats and dogs.

Now home to a drinking establishment, this building has a macabre history.

This stately bank building hides a spectacular star-studded ceiling.

It's a mystery how these curious columns wound up in an Edinburgh suburb.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

This 16th-century house tells the city's history through old artifacts and quirky tales.

This small museum in a 17th-century building honors three iconic Scottish writers.

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

Anonymously sculpted and donated, these sculptures made from poetry books and pages are sprinkled around the city.

The first public library in the Americas has more than 45,000 books dating back to the 15th century.

These ruins of a Phoenician sanctuary in Sicily have a dark history.

This ancient walled garden turns fog into food.

Also known as "Robin Hood's tree," this tree became a famed location along Hadrian's Wall before it was cut down in an act of vandalism.