Invisible Walls
From WikiRaider
The Invisible Walls are bugs, that appear in several Tomb Raiders.
They stop Lara from going through what appears to be clear passage.
An invisible wall could be found in Tomb Raider III, in the Level Lud's Gate. It would stop Lara from collecting the secret in the big chamber with the divers.
There is also an invisible wall in Peru, Paraiso in Tomb Raider Legend. It seems as if the developers have forgotten to place a fence-texture there.
