Commonly acknowledged as the only public monument to the Devil himself.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A giant replica of an Assyrian cuneiform tablet stands in the middle of a busy intersection near the city center of Kayseri.

A stone structure built thousands of years ago on the Iberian peninsula.

The spectacular geological formations make it one of the most impressive caves in Europe.

On the outskirts of Edinburgh, a trio of topiary created by one man over the course of more than 20 years.

Scotland's first Masonic lodge may also be the oldest in the world.

Once home to a Scottish baronet, this 18th-century historic house doubles as a legendary art space.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

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

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

A 18th century graveyard and its astonishing cortege of macabre iconography.

In the middle of a sleepy Paraguayan village, a more than 20-meter-tall medieval castle protrudes into the air.

These 400-year-old ruins are all that's left of the monastery where Ines de Castro was assassinated by the King of Portugal.

The tomb of one of the greatest travelers in history.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

A replica of a 17th-century map of the stars stands in the courtyard of a Belgian university.

A Victorian garden in a harsh climate at the border of the prairies and foothills of the Canadian Rockies.

Dozens of playful sculptures blanket these 200 rolling acres of farmland in an ode to art and landscape.

Nicknamed "Karri Knight," this Eucalyptus was planted in 1895 and stands at 72 meters.

This humble bench is considered the most beautiful in the world.

Poet Antonio Machado's former residence offers the quintessential Castilian lifestyle of the provincial towns in the early 20th century.

An abandoned 6th-century monastery features a medieval map of the known world.