The problem is there is just so many and in a couple styles. Just Google “Classic D&D maps” and get overwhelmed.
Can also search for Mike Schley, he does lots of maps in many ways and they are all cool.
But some well known oldies off the top of my head are like White Plume Mountain, Temple of Elemental Evil, Against the Giants, Queen of the Spiders, and Tomb of Horrors to name a tiny few.
I was going to mention Temple of Elemental Evil, then realized you could probably build a house (or at least a treehouse) with the amount of wood it would take to map the entire dungeon.
And world’s largest city and world’s largest dungeon.
fantastic!!
Omg that’s just up the street! Time to get a library card in this city.
(Just saw the pop up for your reply)
This is absolutely awesome. This is one of the reasons I got the glowforge for…to make D&D items. I can’t wait!
So cool! Really well done. I played D&D back in the 80s 
Same here “Keep on the borderlands” was the first I ever played 