This mountain is one of the largest in Scotland but is better known for its hollow insides.

This former chapel resides on an island connected to the mainland by one of Shetland's iconic beachy tombolos.

This audio art installation pays tribute to the weather and unique linguistic history of the archipelago.

An angelic, yet demonic-looking figurine presides over one of Glasgow's most ancient streets.

Glasgow's memorial to the International Brigade volunteers from Great Britain who fought and died in the Spanish Civil War.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

Glasgow's own "tipsy" temperance monument.

These skilfully executed, poignant works of art dot a verdant Scottish dell.

Cascading waterfalls mark the gateway to the ancient burial place of Clan Macnab.

Described by William Wordsworth as a "World of Wonder."

The dance of this huge clock is a magnificent and eerie commentary on good and evil in the history of humankind.

This city square dates back to the Scottish Enlightenment and was home to some of Scotland's brightest minds.

A remarkable feat of Victorian engineering across the Firth of Forth.

Wander around the extensive remains of this 12th-century medieval church.

Aside from denoting a public square or market, this medieval structure was also a sign of a town's prosperity.

Andrew Carnegie funded the building of almost 3,000 libraries across the world, this was the first.

The largest terracotta fountain in the world, built to commemorate Britain’s Victorian achievements.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

Inside this church are the alleged remains of the patron saint of lovers, epileptics, and beekeepers.

An ancient Egyptian temple in the middle of Madrid, Spain.

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.