Welcome to Uhgramudd, you'll never find a more disgusting, remote, fly-ridden, swampy Hell than this. Get in, kill the Lizards, grab the loot, get out. Simple, right?
This is an introductory low-level adventure I use to get familiar with players I meet online, to see if our play styles clash in any way. So far, it has weeded out a few undesirables and scored a few keepers. I am quite satisfied with the layout and have run it multiple times, with slight variations for level/abilities of the player characters.
Real World: some Indians in the Amazon treat their eyes with a traditional potion applied with palm leaves. Brutally painful, the drug alters vision, giving the jungle's dense green walls greater texture and dimension. You could adapt this to desert or swamps, or other hard to navigate regions.