Built on the foundations of an ancient Roman villa, the unique architecture of this castle on the Catalan coast was used as a set for 'Game of Thrones.'

A science fiction-inspired apartment building designed by a famous Spanish architect.

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

This imposing modern citadel started out as a home renovation project.

Cursed swimming pool left abandoned is now a favorite of filmmakers and ghost hunters.

The Gaudí-inspired building that was the start of Terrassenc modernism.

A long strip of fossil-filled limestone makes up this natural bridge above a rushing stream.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

An ornate tower shows off a local artist's architectural flair.

A modernist church in an ancient village.

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

Replica of Seville, Spains famous Giralda, a former minaret converted into a bell tower.

Experience this Iron Age village the way that its original residents would have.

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

Extraordinary animals sculpted from leftover junk.

An abandoned amusement park turned street art gallery with open walls for visitors to spray paint.

Nuclear waste experts study this prehistoric crater lake to envision landscapes one million years in the future.

The remains of the last Gonzaga villa, a luxurious palace built in spite of an economic crisis.

Since the 1960s, this small village has invited painters to decorate its walls.