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Remote sensing offers an important means of detecting and analyzing temporal changes occurring in our landscape. This research used remote sensing to quantify land use/land cover changes, and landscape metrics to track ecological impacts of such changes at the Effigy Mounds National Monument (EFMO), Iowa, USA. Aerial photography spanning a period of six decades, IKONOS pan-sharpened (1×1 m) data, and input from the US National Park Service were used to develop land cover classification maps for the 1940s, 1960s, and 1990s. A post-classification algorithm was applied to derive land cover changes, and landscape metrics were used to analyze specific habitat classes. Overall changes in natural vegetation between 1940s and 1990s at EFMO showed interchangeable shifts whereby the canopies of some areas of deciduous forests and bottomland woodlands thinned out, whereas others transited …