Doors and More Doors

There are many acid pools and, beside them, there are piles and piles of bones you hadn't seen before. You shudder at the glimpse of such a ghastly sight. These aren't any regular bones, either: they're human bones. You look ahead to see a forest surrounded by cliffs, interlocked into the hills.

Curious, you walk a few steps closer, just to aggravate the pools. One behind you spurts up, blocking where you just came from. Acid fills where your foot was a second ago. Some green liquid seeps towards your foot... but you lift it in time. You look ahead. There is a clear path to walk slightly to the left, but there is a short-cut straight ahead with a shallow layer of acid covering it.