A personal favorite, the WORLD OF GREYHAWK box set [Gary Gygax, 1983] for AD&D is a feast for the eyes. The draw of the set is, of course, the gorgeous two-piece map of the eastern extents of the continent of Oerik.
The maps are truly massive: The two sourcebooks in the set [Guide to the World of Greyhawk (80 pages) & Glossography (48 pages)], I’ve placed them on the maps put their dimensions in perspective.
Find WORLD OF GREYHAWK
Noble Knight | Amazon (box) | Amazon (books) | DriveThruRPG (PDF)
Was the cover style of D&D 3e inspired by the World of Greyhawk box art?
See Also:
Which WORLD OF GREYHAWK box set do you have? (Photos of the two versions)
World of Greyhawk, folio edition (3rd print) – A thing of beauty