So, thought I'd give this a go. I spent a long time looking at dungeons, but this is my first educated attempt at one.
Basic layout is attached, I did forget to add a legend to explain my scribbled markings, but is basically as follows:
| |. Doors are parallel lines through walls
Doors marked with an X need a puzzle solved or switch hit to open.
Doors marked with an S are hidden but not locked, in this case behind vines you have to cut.
Doors marked with a key (looks like an o with a sideways F ) are locked
Keys are drawn below their chests, big chests are marked with their contents.
The path through the dungeon is marked with a colored line, it starts red, turns green, then turns blue, so it wouldn't get too confusing.
Stairs are highlighted in yellow and have a letter corresponding with their other end.
Enemies aren't usually marked, but would be in there.
Anyway, looking back over this, it might be a little bit short, but it is the first dungeon and I don't know if we want huge sprawling dungeons, or more concise ones so we don't bite off more that we can chew. Also, I'd love to work more on this with feedback, which could add content.