Here's a link to a website dedicated to documentation of some 2,526 abandoned airfields in all 50 of the United States:
Abandoned & Little-Known Airfields
There is probably a similar site for British and European airfields. As a matter of interest, I have a book titled: "Airfields of the EIGHTH Then and Now" documenting airfields used by the U.S.A.A.F. during WWII in the U.K.
Cheers,
Grog