The room with the bridge

With no clue which choice is best you pick at random and go for the door leading to a bridge.

Wasting no time you rush to your chosen destination. Behind you large chunks of stone fall from the ceiling and ever-larger cracks appear in the floor. As soon as your foot passes through the open doorway the world around you blurs...

...and then comes back into focus, leaving you a bit disoriented.

Once your disorientation has passed you take a look around and are quite surprised by your new surroundings. For starters there are tall, rocky mountains on your left and right. The stone bridge ahead of you is much bigger than it seemed before – it is wide enough for two carriages to pass each other without issue, and it is at least a few hundred meters long. Despite looking ancient it seems to be in near-perfect condition. It leads to a fork in the road where you could go left or right.

If you were to not cross the bridge and instead go in the opposite direction you will eventually reach a spot where the road splits in three. There's nothing to indicate where each road may lead.

The sky above you is cloudless and blue, with something flying in the distance. It is too far away to tell if it is a bird or something else. And below the bridge is a seemingly-vast chasm. Fog hides the bottom and makes it impossible to see how deep it really is.

Another quick look around confirms two things. First, the door that led you here is gone, so no way to go back. And second, there's barely anything other than rocks and stones in the area. There's a little bit of vegetation here and there, but that's it.

“Great. What am I supposed to do now?” You ask yourself.