This stop on the Camino de Santiago stands high above the underwater ruins of a medieval town.

The mysterious remains of a martyred teenage saint are venerated inside a small country chapel.

This enormous censer uses a pulley system installed over 400 years ago.

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

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

The oldest Roman lighthouse still in use.

This panoramic lift provides a futuristic ride up San Pedro Mountain.

Giant granite sculptures representing family on the northern coast of Spain.

This humble bench is considered the most beautiful in the world.

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

An abandoned Indian-inspired mansion.

The young girl gained fame for her atypical size and was regarded as a curiosity by the Spanish aristocracy.

Made up of 3,200 recycled glass bottles, this tree pays homage to Asturia's love of cider.

This enchanting green space houses a labyrinth lined with toxic plants.

A small house in Tazones, completely covered in shells.

A magnificent place to see authentic paleolithic cave paintings that are an astounding 33,000 years old.

A road that winds through this natural cave is the only way to access the small, appropriately-named village of Cuevas.

An out-of-place grove of sequoias thrives in northern Spain.

This magnificent brick dome was made with an unusual design method.

This beautiful spit of land was once the summer playground of the king of Spain.

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

Giant topiary dog once played a role in a terrorist bomb plot.

This 19th-century fountain's namesake animal isn't what you think it is.