This place is not a place of honor... no highly esteemed deed is commemorated here... nothing valued is here.
At the rate we're going it might be more something along the lines of 'If you can read this and your geologists uncovered buried cities then welcome, Aliens. And if we are your ancestors: by some miracle we seem to have survived'.
This is so stupid. Just use comics. Like the Aegyptians.
I like the idea of vaulting dangerous stuff in a way that requires advanced technology to open. The idea being that if a civilization is advanced enough to open the box, they'll have the tech to detect the hazard, and maybe even mitigate it.