At OSI, we protect land for people, for wildlife, forever. Learn More About Who We Are
A Place for Life.
What We Protect
New & Noteworthy
Featured News OSI Announces Million-Dollar Plan to Improve its Tahawus Property in the Adirondacks
OSI has announced a plan to make $1 million in capital improvements at its historic Tahawus property, where Theodore Roosevelt was staying when he received the message that he was to become President.Read More
Featured e-News AUGUST: FOCUS ON RECREATION
From renovating a beloved performing arts center in Harlem to South Carolina's Jones Gap State Park, and places in between, OSI supports and expands places to play.Read More
- OSI Support Leads to Conservation of More Than 4,300 Acres at Cherry Valley National Wildlife Refuge for Drinking Water, Wildlife Habitat
- The Open Space Institute Donates the Hannacroix Creek Nature Preserve to New Baltimore Conservancy
- OSI Unveils Story Map on McHenry Hudson River Valley Awards
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