[Ramsus]

Well, those of us that are doing it, we're doing it because you never know when the GM will throw traps/secrets/hiding monsters at you. Honestly, we're most likely being overly cautious but, until we get a handle on Vesth's style, better safe than sorry.

You probably could make a nature check about something but, you'd have to have an idea for what. Otherwise the GM is likely to taunt you with random factoids about the moss growing on the walls and the type of rock. (Actually that might happen with our perception checks too.)

One thing I will note though, you search stuff with Perception, not anything else (unless there's a really good excuse). Nature is primarily a knowledge skill that you can also use for a couple other random things like dealing with animals, hunting/foraging, tracking, etc.

Low-light vision would be helping you depending on just how dark this cave is....if I hadn't lit a torch (because enough of us, including my character, don't have any special vision).