Chasm Monastery is a location in Tomb Raider (2013).
At one point you will come to a chamber where you are attacked on the lower level upon entering. You seem to be stuck there, after the fight. Head up to the balcony. You will spot a giant bell, if this would fall down, it would open up a hole in the ground. Note the two windows which can be opened to let the wind in, also note the two damaged pillars and the dangling weight. Open one of the windows and use the rope to pull the weight while standing in front. It will ram into the pillar and break it. Close the window and repeat this on the other side. Then open both windows to ram the weight into the bell. It will then fall.