Zona Alfa is a really useful system and is usable beyond The Zone.
The Points of Interest rules (soon to be included in the Kontraband expansion) add a suitable degree of randomness suitable for solo (as well as co-operative) play.
The Points Of Interest need some kind of "point" to be interested in. For Zona Alfa I have 40mm bases with a plastic drum and a techno-case - all with glowing contents.
However for my more "Now" apocalypse, I wanted something a bit more subtle.

These are Debris of War, Crooked Dice and Tamiya fuel drums on 25mm diameter Renedra bases.

Warlord German Turret numbers in white indicate they are more than just scatter terrain (POI events are drawn randomly from a deck - so in this case the numbers are not significant).

This US Marine is going to have an eventful turn.
Points of Interest should (of course) be more than six inches apart.

Someone drew the "Sniper!" card.