Some years ago I bought a Garmin E-Trex GPS handheld device. The main reason originally was to use it as a speed indicator for the boat, until I realised that the ordinary car satnav would work just as well in that role. It has many display options, not just speed. It gives average speed, distance covered, location and height, as well as times of sunrise and sunset etc.
One page gives a track of where it has been with a zoomable scale. In the photo below the width of the display represents 1.6 miles; the pattern indicates the various paths and roads we have walked recently. Our home is approximately in the centre.