Horicon Marsh, Dodge County. February, 1970. Altitude 11,000 ft. This high altitude, high oblique photograph looks over the entire Horicon Marsh toward the northern horizon. Once a shallow glacial lake, the northern portion of the marsh is now controlled by the federal government, while the southern half is state-regulated. It is a major breeding and "stopover" area for migrating waterfowl. The community of Horicon, its dark-colored streets contrasting against the white snow cover, is at lower right. The city of Waupun is seen as a dark spot toward upper left. Lake Winnebago and the cities of Oshkosh and Fond du Lac are visible at upper right. The Eldorado Marsh is between the north end of the Horicon Marsh and Oshkosh. The Niagara Escarpment at Oakfield is seen as a dark line to the northeast of the Horicon Marsh.