Crater game
An interesting part of the Barringer Crater site (it's all interesting, actually) is a "Meteor Game", in which you can select object sizes from 0.1 m to 1.7 km diameter, pick a target city (from a very short list) and see what happens. Scary that even a fairly small iron meteorite, undetectable until impact, would destroy most of any major city if it hit there.
Crater Game