Constructed in 1252, Reales Atarazanas or the Royal Shipyards was once the place where the Spanish Navy's munitions and artilleries were stored. If you're a sucker for history, this one is a must-see when in Seville. Now a venue for modern art and concerts, this beautiful Gothic building opened its doors for public visits only in the late 1900s. The building's architecture alone more than justifies a visit to this place.