I went to a talk by Alastair Humphreys last night. https://en.wikipedia.org/wiki/Alastair_Humphreys

We was plugging his new book about picking squares on a local map and seeing what was there - as a deliberate alternative from flying across the world to have an "adventure".

I believe there's a similar app where you can tick off map squares.

Has anyone tried to do this? I've heard of similar challenges of walking on every footpath within a 5 mile radius of your house. Sometimes arbitrary things like this can be a source of unexpected pleasure - finding things you wouldn't have otherwise.