A Spanish town built into the cliffs.

This medieval synagogue survived the Inquisition as a hospital and church.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

This short white tower is all that's left of Scotland's first permanently manned lighthouse.

It's believed this well was once plagued with evil spirits until St. Columba purified the water.

Designed to allow funerals to proceed over the River Dulnain.

Britain's only herd of free-ranging reindeer.

This site contains overlapping ancient graveyards that existed about 1,000 years apart.

This lovely Scottish nature walk leads to the source of a local legend.

The world's shortest street was created by an awkwardly placed hotel.

This tiny island featuring 9th-century Viking ruins is only accessible at low tide.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

Enter the world under the hill at this ancient UK burial chamber.

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

A nuclear bunker built to shelter the politicians and important people of Scotland in case of nuclear attack.

Every St. Andrews student knows to avoid this inscription for fear of a martyr's curse.

This town hosts 170 pieces of public art, including giant irises, flying saucers, and, famously, hippos.

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

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