The Lizard Cairn was thrown together on the fly when I needed a side quest for a level 2-3 party who weren’t up for the job of wiping out the lizard men who were in their way. Instead they allied with them for help in their quest on condition that they remove the undead lizardfolk from the ancient lair and cairn of the lizardmen until it was overrun by a necromancer 40 years ago.
Now that the cairn is taboo, they cannot enter themselves to clear it out, but once the dead are back in their crypts and not running around trying to eat lizardfolk brains, they will be glad to move back home and send along one of their warriors to help the party in their quest.
The lizard cairn is situated in the middle of a lake, like a stone version of a beaver lodge. The first level is accessible by the opening and spiral stairs on the top of the mound, as well as an underwater passage entering in from the eastern side under the surface of the lake.
Portions of the cairn are semi-submerged, but being carved out of a solid piece of stone, the whole thing has remarkably managed to avoid being completely flooded. It is a two level construction (the bottom level is, obviously, the lower map of the two shown here).
The map was drawn with an HB #2 Pencil on plain white paper with graph paper set behind it as a guideline, then scanned into Photoshop and contrast-enhanced as usual.