In reply to samandress:
Theres no substitute for reading books unless you go out with someone who has a knowledge or interest in different things.
There are as Tom says book available for every bit of this country listing every crash site known and plenty not known since flight began. There are a few crash sites here in NY which still have bits to see!!, and there's a lake in Ireland where from the hill above you can see the whole tail fin of an american bomber. If you don't like reading then there are pa few we sites which list them too.
I used to go for walks to cover distance. I now go on walks to cover objects and things of interest! Its much more fun. For example thousands of people on the Cleveland Way and C to C pass by a wrecked trawler hard up against the cliffs here near Robin Hoods Bay. .99% never see it as it involves stepping off the path and looking over the cliff and you've got to know which bit of the cliff!! You certainly get to see more!