Swamp Caves

Publisher's blurb: Seven large caverns (30x30 squares) ten smaller caverns (15x15) usable by themselves or fit together to form sprawling wet and slimy weed choked cavern complexes. Why are swampy weeds growing in caves? I don't know. Shafts of light from the ceiling, druidic magic, lots of reasons. Do you question the details of several tons of dragon staying airborne? Cut me some slack here. I'm sure there aren't any trolls or dead things hidden in the weeds. Intended for virtual table tops.