Located just south of Caledon Village, the Cheltenham Badlands are one of the best examples of badland topography in Ontario. Land clearing left the soft Queenston Shale (essentially red clay) exposed to rain and has caused erosion to create rounded hills and gullies. Iron oxide present in the shale accounts for the red colouring; circulating groundwater causing the change of red iron oxide to green iron oxide accounts for the narrow green bands.