This unique rock formation is quite the local celebrity, although one day it may come crashing down.

The ruins of the first mountaintop observatory are just a hike away.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

Building owners can take out tiles for free at this repository for historic building materials.

This castle has links to Portugal’s founding and struggles for independence.

This giant sculpture made of trash is a critique of society's wastefulness.

A hidden three-foot-wide house separates these two regal churches.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

Elaborate tile work in this railway station tells the story of Portugal.

This centuries-old tower hosts endangered bald ibis mating pairs and looms over a pristine beach.

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

Built between 1901 and 1908, this building is one of the most iconic examples of modernist architecture in Spain.

A gem of Catalan modernism amidst the vineyards.

Former 19th-century apothecary serves a top-tier version of Valencia's signature cocktail.

The gaunt visage of this angular Christ giant is enough to put the fear of God into all who see it.

This local cultural center is housed in one of the most important Valencian Art Nouveau buildings in a town that is blessed with many.

This exhibition space designed to look like the skeleton of a whale is hidden underground.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

This fountain is dedicated to the workers who perished constructing the Fréjus Rail Tunnel.

When this funny little building went up in the 19th century, most people thought it would simply fall over.

This sinister Baroque entryway could lead you to a terrible fate.

This building has a giant piercing through one of its corners.