A Twisting Tunnel(out and deeper)
You are in a long twisting tunnel. The top of the tunnel is about four or five feet above your head and you don't have to duck to move along. The walls are smooth to the touch, and you can see small gems embedded throughout the tunnel. The owners of these tunnels are Elves, but you could swear that this looks like the work of Dwarven miners. The tunnel seems to have a gradual slope up as it travels deeper into the mountain.
The only obvious exits are out and deeper.