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

An archeological treasure trove stumbled upon by a couple of children.

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

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

The oldest Roman lighthouse still in use.

A living art gallery painted on a canvas of Monterey pine trees.

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

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

Mountain where Jesus was first tempted by the Devil.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

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

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

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

This Navarrese cave's history of witchcraft and pagan ritual is not just embraced, but recreated each year.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

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

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.