A completely underwater art museum sends a stark message about humans' impact on the environment.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

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

An isolated village literally built into the crevices and rock formations of a mountain.

A Spanish town built into the cliffs.

This Funeral Hearse Museum represents the finest in cadaver transportation.

This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.

A landscape decorated with enormous skull sculptures.

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

A Spanish forest is filled with mysterious stone carvings.

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

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

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

A lush indoor jungle fills this bustling Madrid transportation hub.

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

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

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

Wonderland replication in progress by one persistent man.

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

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

Bacteria and algae give the salty water its bubblegum hue.

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

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

An ancient Egyptian temple in the middle of Madrid, Spain.