Shining the glow ring, they'll hear some loud squeaks as rats scurry away. Through the cracks, they can glimpse something pulsing inside. The vegetation through it smells normal unlike the rest of the area, and some moisture is in the air. They can also chip bits and pieces off of the wall, suggesting that it's possible to break through.

They'll need a greater force or more people to help break the wall down entirely. They can make one attempt at once, separate individuals can continue to steadily crack the wall using different methods, or a combination of the two.