Like many older cities in the U.S., Philadelphia is situated along a river, actually two, the other being the Delaware River. Of the two, the Schuylkill retains more of its natural beauty, because city fathers long ago turned acreage along the river into a park in order to maintain the city's water shed. Here you will find the river trail, which is about 8 or 9 miles in length and a favorite among bicyclists, joggers, and walkers. The section upstream from the Philadelphia Museum of Art is particularly scenic due to the presence of jaunty, turn-of the-century boat houses and the pencil thin sculls stored in boat racks. If you're lucky, you will see sculling teams from local universities such as University of Pennsylvania and Drexel rowing on the river. The walk also features sculptures here and there. The Spirit of Enterprise by Jacques Lipchitz is a locally famous depiction of a man riding an eagle. Lipchitz was a cubist sculptor, and this piece is a little weird. Also in the area just upriver from the museum is the old Philadelphia Waterworks. There is a free, informative exhibit here explaining the public water and sewer system and the buildings, which were major tourist attractions in the late nineteenth century ( 2nd only to Niagara Falls ) when providing water and sanitary waste removal were new and innovative services. Something else that is free in this area is parking ( just off Kelly Drive ), an extremely rare thing so close to center city.