Bordering the parking lot and ballfields at Cheshire Park (Cheshire, CT) is an esker (sinuous sandy ridge deposited underneath a continental ice sheet during the last glacial period). The esker is covered now by trees, but the sinuous ridge is still visible in topography (hence the 3d view!).
Elevation and image from "The National Map" (hosted by the U.S. Geological Survey). 3D modeling completed in Blender.