This one's incredible. A map of the Mississippi over time,
It’s the kind of detail that you notice when cycling- the ridges and folds of the land that travelling in a car flattens out. Also most of my routes are quiet roads and lanes - the tracks that have essentially been pathways forever as opposed to bulldozed A roads. That sense of a link between history and geography is particularly strong once you get away from towns and into the country.Going for walks during lockdown, I've got weirdly obsessed with this topographic map of the UK:
I think that what makes it interesting is that it re-scales the vertical axis as you drag and zoom, so rather than just having most of South East England labelled as "flat", you can zoom in and see the little micro-ridge systems that underly all the small inclines that you notice North London or Cambrigeshire or wherever.