This unreal Portuguese palace looks as though it's made from a pile of different castles.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

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.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Famously misunderstood wonder of the ancient world

England's oldest surviving hedge maze has been confusing visitors for over 300 years.