This Funeral Hearse Museum represents the finest in cadaver transportation.

Moorish signal station on a stratgic rocky outcrop.

Of course Salvador Dalí lived in a castle...

The world's largest wooden structure.

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

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

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

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

Stunning Roman aqueduct used for 1900 years and still standing.

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

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

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

Village situated on a narrow volcanic escarpment.

The final resting place of the great navigator, or maybe his brother.

Abandoned Nazi train station turned underground astroparticle laboratory.

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

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

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

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

Bacteria and algae give the salty water its bubblegum hue.

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

A Spanish forest is filled with mysterious stone carvings.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'