In Czechia there is the awesome Czech Hiking Markers System, used since 19th century (it has since spread to other, mostly European countries). No GPS needed, s

In Czechia there is the awesome Czech Hiking Markers System, used since 19th century (it has since spread to other, mostly European countries). No GPS needed, sometimes not even a map, because it is being constantly maintained by volunteers from Czech Tourist Club [1] who make sure the trail markers are visible and the trail is safe. [0] https://en.wikipedia.org/wiki/Czech_Hiking_Markers_System https://en.wikipedia.org/wiki/Czech_Hiking_Markers_System [1] https://en.wikipedia.org/wiki/Czech_Tourist_Club https://en.wikipedia.org/wiki/Czech_Tourist_Club