A musical instrument played by the sea.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

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

The world's largest wooden structure.

A unique seaside cave where Aleister Crowley faked his own death.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.

Morocco's largest Jewish cemetery.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

This road winds through the steep coastal cliffside offering spectacular views for those who brave the drive.

Formerly known as the Malay Quarter, Bo Kaap is a colorfully-painted suburb located in the “Mother City” of South Africa.

Despite many attempts to finish this overpass, it has been abandoned since the 1970s.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

An ancient necropolis of magnificent tombs.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

Legend says this sacred tree was a gift from goddess Athena.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This small chapel is built of human bones and decorated with a golden skeleton.