If I understand right you would need a map and when you click a place it should draw all the possible places a person could have walked to, in a limited time. I think nothing like that exists, but could be done. [This is a similar idea][1] but with public transport. You move the slider in the bottom, and see how far you can get with public transport in a given time. It doesn't work with all cities. cities. It uses OSM data of public transport. [1]: http://www.mapnificent.net/auckland/#/?lat0=-36.85616640884299&lng0=174.75604364013668&t0=20

If I understand right you would need a map and when you click a place it should draw all the possible places a person could have walked to, in a limited time. I think nothing like that exists, but could be done. [This is a similar idea][1] but with public transport. You move the slider in the bottom, and see how far you can get with public transport in a given time. It doesn't work with all cities. [1]: http://www.mapnificent.net/auckland/#/?lat0=-36.85616640884299&lng0=174.75604364013668&t0=20