This massive fiberglass Gulliver turns every visitor into a Lilliputian.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

The studio of Catalonia's most famous theatrical designer remains exactly as he left it.

An architect transformed this abandoned cement factory into his castle-like workshop.

The atmospheric road was never meant to be so creepy.

Famously misunderstood wonder of the ancient world

One of the largest ossuaries in Spain is packed from floor to ceiling with bones.

Stunning Roman aqueduct used for 1900 years and still standing.

A temple to modernity, tucked away amid Barcelona's more well known museums.

Numerous sculptures set along hiking trails symbolize and idealize the relationship between man and nature.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

This awesome Spanish castle is so fantastical it was actually used on Game of Thrones.

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

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

An ambiguous ambience emanates from this centuries old leprosy quarantine.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

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

A Spanish forest is filled with mysterious stone carvings.

Cliffside houses provide a spectacular view from their perch above the valley.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

The hermits of Karoulia protect their asocial lifestyles by living on the vertical face of a treacherous precipice.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.