This picture has been sent in by MG. He writes: "Waterfall Glen is a forest preserve that has been quoted as that it possibly may be the most astonishing parcel of open space in DuPage County, if not northern Illinois. This huge forest preserve located south of the town of Darien completely surrounds Argonne National Laboratory. This is one of DuPage County's largest preserves containing the most diverse plant and animal populations in the area. The area got its name from Seymour 'Bud' Waterfall, and not the small man-made waterfall that Salt Creek flows over. He was an early president of the District's Board of Commissioners."