Thanks Mark for the maps...
Frank, in case you didn't see the link, I got these views from my favorite satellite (visible-spectrum) view:
Click on a region for a more-detailed view (but their "image map" is off, so you have to offset where you click to get what you want).
This is one of my oldest web bookmarks, from back before I owned a computer and only had Internet access at work...maybe 20 years ago.