There is something extremely interesting about any attempt to communicate with the future. I remember reading at the time about what symbolism they were going to use -- at that point I don't think the stuff about giant berms and spikes had materialized. I was skeptical of what they came up with. I remembered thinking one thing you absolutely needed to plaster all over the enclosure was two-frame before/after pictures: before, humans and animals playing against a neutral background. After, same thing except everyone is obviously, totally dead. Mangled, if possible. There's next to no way to anticipate how to say "dangerous materials" in 10000 years. But dead fauna is pretty damn clear. Dead fauna says, "stop and think about what you're doing." And that's all we can really hope for; caution. Because any future society will be curious before any other emotion.
shakes pages from A Canticle for Leibowitz"He had never seen a "Fallout," and he hoped he'd never see one. A consistent description of the monster had not survived, but Francis had heard the legends. He crossed himself and backed away from the hole. Tradition told that the Beatus Leibowitz himself had encountered a Fallout, and had been possessed by it for many months before the exorcism which accompanied his Baptism drove the fiend away.
Brother Francis visualized a Fallout as half-salamander, because, according to tradition, the thing was born in the Flame Deluge, and as half-incubus who despoiled virgins in their sleep, for, were not the monsters of the world still called "children of the Fallout"? That the demon was capable of inflicting all the woes which descended upon Job was recorded fact, if not an article of creed."
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99% Invisible did a memorable episode about this, which has a great song in it: http://99percentinvisible.org/episode/ten-thousand-years/