sentences:  The preserve is used by students in their science and nature activities.The designer of the grounds, Jens Jensen, was known as the "dean of the world's landscape architects", and "the father of the Chicago park system", for his creation of Humboldt Park, Garfield Park, the Cook County Forest Preserves, and his masterpiece, Columbus Park, in Chicago.Jensen's work became famous for his exclusive use of plants and materials native to the local region, and was characterized by his use of open spaces, flowing water, gently curving lines, and "council rings", or low circular benches where people can gather.