A landscape decorated with enormous skull sculptures.

A Spanish forest is filled with mysterious stone carvings.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

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

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

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

Wonderland replication in progress by one persistent man.

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.

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

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.

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

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