The Hudson River Valley has a number of groups working to preserve its lands, and they all depend on donations big and small to do their work. We're lucky to have this land around us -- this gorgeous, mysterious shot looking at Osborn Castle by Christine Ashburn reminds us of that. One group is Scenic Hudson , which is working to protect 65,000 acres of what it dubs the most important land along the river -- the "must save" landscapes that meet New York State's highest standards for ecological, scenic and agricultural values. Another is the Hudson Highlands Land Trust , which has been working privately with landowners since 1989, when local residents united to form an organization that would provide conservation options for individuals. A third is Open Space Institute . OSI achieves its goals through land acquisition, conservation easements, regional loan programs, fiscal sponsorship, creative partnerships, and analytical research. Online donations are accepted for al...