The world is full of of outdoor ancient art, sites where past civilisations have created magnificent works of art for reasons we can only speculate about. We've put together a wishlist of 10 distinctive art destinations, each of which could be the centrepiece of an art-lover's trip. The Nazca Lines of Peru and the Ajanta Caves in India are our favourites, but all 10 are special in their own right.If you visit even a few of these places, you may well be left pondering why their creators felt the urge to leave their mark this way. If you are, you'll be in good company, joining the many people who have asked the big, timeless question:What is Art Really For?... Read more . . .