Sponsired by the Port of San Diego, this outdoor sculpture progam features about 30 pieces. Changing each year or so, these beautiful and varied sculptures run along North Embarcadero on Harbor Drive from Broadway to Grape Street. Each sculpture is a different artists creation based on the theme of trees. The scupltures are made of all sorts of durable materials including metal, glass, plastic, and wood. Some scuptures move, some make noise, some just stand quietly.