A masterpiece of Art Deco architecture hidden in plain sight in West London.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

The hidden ruins of an old hydroelectric plant reclaimed by nature.

A Spanish town built into the cliffs.

The world's largest wooden structure.

An eerie collection of the surviving structures from a past celebration of the future.

Europe's largest prehistoric mound – burial site of a legendary king?

The majority of the highest mountain in Poland is actually located in a different country.

A restaurant devoted to "trouser grip" wrestling, an ancient form of Viking wrestling that is Iceland's national sport.

Iceland's tribute to its thankless civil servants.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This beautiful, historic church looks like something out of a simpler past.

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

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

An encyclopedic collection of mammal penises.

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

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

This industrial gem was one of the earliest examples of a metal-framed building.

The granddaddy of English geoglyphs dates back to the late Bronze Age.

This strategically placed hill fort has served defensive forces from the Iron Age up until the 20th century.