After an hour you see a large cave opening. The path climbs steeply upward towards it -- but not too steeply for you! There's lots of twiggy undergrowth to hang on to as you climb to the top. There's a breeze coming from the entrance. Phew! Something in that cave sure smells bad!
You step over some yellow-brown rocks and enter the cave. It's oddly warm in here -- and the ground is moist and squishy. Hey! The floor is moving! Are you going to stay in the cave, or leave and go back to the fork in the road?