An unusual but excellent display created in the 1930s as propaganda against the Freemasons.

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

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

An old wool-washing house filled with Fluxus contemporary art.

The medieval town's star-shaped walls are geometrically dazzling, though not entirely impenetrable.

Blue-green pools and smooth stones comprise one of Spain’s most idyllic hidden wonders.