The Watts Towers of Los Angeles are a collection of 17 sculptures, adorned with a mosaic of broken glass, shells, pottery and tiles. Built over a period of 33 years by one man - Italian immigrant, Simon Rodia - they eventually grew to three gigantic spires, two walls, several smaller towers, a gazebo and a patio. The tallest tower is just under 100 feet, yet the entire construction was built without bolts, rivets or welds. Designated Cultural Heritage Monuments by the City of Los Angeles, since 1986 they have been the subject of a conservation effort involving city employees, the Getty Conservation Institute and the Los Angeles County Museum of Art. Variously labelled over the years as idiosyncratic folk art, caprice and fine art, the Watts Towers continue to amaze.