Week-long block party becomes a competition for the best decorated street.

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

A stately palace has been converted into the world's largest cannabis museum.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Mountain where Jesus was first tempted by the Devil.

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

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

These crumbling ruins are all that's left of the ancestral home of Clan Crawford.

This impressive Gothic church dates back to 1244 and stands on the site of one of the first churches in Scotland.

A pair of stone circles positioned on the bank of the River Esk.

This Norman church survived the Reformation before suffering 300 years of neglect.

A rare example of a Lowland broch.

A 19th-century Neoclassical building now housing a Hindu temple represents modern-day Glasgow at its most multicultural.

This vessel is the final ocean-going paddle steamer in the world.

Believed to be the capital of the the ancient kingdom of Dál Riata.

This remote Scottish island has the only round church in the nation.

These ruins saw a second life as a cemetery.

The ruins of a 15th-century tower house.

The ruins of this magnificent Scottish castle blend both Gothic and Renaissance architectural styles.

These stones date back to the 3rd or 2nd millennium B.C.

A beautifully-carved Pictish stone encased in a protective glass structure.