Bells (RotTR)
From WikiRaider
Bells are a Challenge item in Rise of the Tomb Raider that need to be found and cut down using the Combat Knife in order to complete the the For Whom the Bell Tolls challenge. They can be found hanging inside bell towers and on top of some other buildings in the Lost City.
The bells are bronze and are fixed in position with a rope. Lara has to stand next to the pole where the rope is attached and press Y to use the knife,