The world's largest wooden structure.

The only urban monument in the world designed by the great surrealist painter Salvador Dalí.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

This house's itty bitty size means no humans allowed.

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

A Spanish forest is filled with mysterious stone carvings.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

The morbid items in this small and hidden museum are not for the weak stomached.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.

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

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

Wonderland replication in progress by one persistent man.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

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

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

This cafe offers a curated collection of treats and tipples made by monks and nuns.

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.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Week-long block party becomes a competition for the best decorated street.

A stately palace has been converted into the world's largest cannabis museum.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.