T1.3

The tunnel is narrow, akin to a hallway, only 4' wide.

Searching the Walls
Perception DC 25 +1/10': You see a small crevice in the wall here, it looks like something burrowed it, it's only large enough for a small creature to crouch in, or a medium creature to crawl through.

Searching the Floor
Perception DC 20 +1/10': ''Amongst the rocky rubble you see a gleam of metal. Bear traps litter the floor and any false step may activate one.''

Disable DC 20 or Acro DC 12: per trap (x12)

Bear Trap: Atk +10 melee (2d6+3); sharp jaws spring shut around your ankle, halving your speed;

May escape with a DC 20 Disable Device check, DC 22 Escape Artist check, or a DC 26 Strength check

From R1
''The tunnel ahead of you is dim, the only light coming from the entrance behind you. The path is rocky and uneven. Further along you hear a cackle of noise and a dim light ahead. A savory smell bellows from whatever lies ahead.''

From R4
''The light from the eatery behind you shines dimly into the tunnel ahead. The path is rocky and uneven. Further along you see a light shining through and a slight breeze of fresh air.''

From K2
''You poke your head out from the tunnel. To your left a cool breeze of fresh air and a dim light from outside. To your right is a warmer air carrying a savory smell and a cackle of noise with it. The path between is rocky and dim.''