Light still pours into the ruins of this ancient Islamic observatory.

The Avenue of Mausolea is a series of grand palatial tombs.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

A magnificent place to see authentic paleolithic cave paintings that are an astounding 33,000 years old.

Made up of 3,200 recycled glass bottles, this tree pays homage to Asturia's love of cider.

This enchanting green space houses a labyrinth lined with toxic plants.

This elegant arc of a waterfall marks a religious turning point.

The most powerful waterfall in all of Europe.

Walk in the footsteps of the gods and straddle two tectonic plates.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

The history of Reykjavik told through a historical village and live actors.

This stunning concert hall has become a symbol of Iceland's national recovery.

This tiny museum's sizable collection is jammed into a former underground public toilet.

The largest whale museum in Europe allows visitors to walk among life-size giants.

Learn about Iceland's hidden folk at this school dedicated to the study of elves.

An encyclopedic collection of mammal penises.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

The curios of pharmacist and collector Henry Wellcome.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

A remarkable medieval structure born from a 14th-century disaster.

This hidden green space is the city's second largest conservatory.

One of these two land speed record-breaking vehicles went so fast it shattered the sound barrier.

The bombed out remains of the old church were kept intact next to the new one, as a reminder of the futility of war.