Sri Lanka has a rich architectural heritage dating back to the third century B.C. Ruins of ancient kingdoms provide evidence of a sophisticated civilization on the island that valued the aesthetic beauty of the arts and possessed advanced knowledge of science and technology, town planning and design, and valued the aesthetic beauty of the arts: marvel at the remarkable engineering of the 5th century Sigiriya Rock Fortress; admire the spectacular paintings and statues at Dambulla Cave Temple; and see the towering dagobas at Anuradhapura, which were once some of the largest man-made structures in the world.