That would be a problem. Perhaps encounters with ruins are a completely
personal things, the ruins aren't in fixed places. EXPLORE might
randomly generate one for you; you could leave it unexplored, in which
case it would remain in existence until you returned to it or someone
else found it. But once a ruin was explored, it would melt away and
vanish.
This would also lighten the burden of map-making. If encounter-junk
is created on the fly, the map needed be seeded with gobs of things
by me initially. If I decided to add something else that could be found,
I would just add it to the list of things that EXPLORE could turn up.
I wouldn't have to add junk to the map.
-- Rich Skrenta <skrenta@rt.com> N2QAV