An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

The oldest Roman lighthouse still in use.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

Cliffside houses provide a spectacular view from their perch above the valley.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an 8th-century Buddhist master.

A seemingly endless landscape of pure salt stretches far across Bolivia.

Famously misunderstood wonder of the ancient world

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

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

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.