A spiral staircase twists to the top of this unusual Czech lookout tower.

This disused church, left to the elements of the Arctic Circle's forests is open for exploration.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

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

Teeny tiny hotel on the coast of the Canary Islands.

Eccentric sculpture garden brings Basque mythology to life.

This Canary island is a quintessential example of nature’s beauty, and its unbridled fury.

This abandoned, turn-of-the-century astronomy hub is now the subject of more photographs than it ever took.

An arresting arch punched straight through a mountain provides one of the most scenic spots, and challenging climbs, on the planet.

Semi-mystical manmade towers of rocks decorate this rocky seaside.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

The streets of a sleepy Spanish town proudly exhibit some of the world's finest graffiti.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

For one day every month Barcelona's Estació de França transforms into a market for model trains.

This 47-story "M" needed 20 years to be completed

A series of recreated fortifications mark George Orwell's path through the Spanish Civil War.

The effect of this ancient form of image projection situated atop an 11th century Moorish palace is thrilling.

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

An ancient Roman theatre restored to its former glory in the Spanish city of Cartegena.

Bacteria and algae give the salty water its bubblegum hue.