I’d like to point out that my dungeons are Science.
Small animals as prey for the large ones are accounted for. Science: Ecology.
Types of tunnels and rock are appropriate for location and depth. Science: Geology.
Multilevel shafts are represented on all levels through which they pass, even if they do not open upon those levels. Science: Geometry.
Undead creatures are located near evil spellcasters or rifts to the negative material plane. Science: Necromancy.