The 'road below the cliff (崖下の道,Gaika no michi?) is an optional area in Resident Evil 4's main story, which must be played in Chapter 2 of Separate Ways. Both involve the player fighting and killing the same El Gigante (evidently the main story canon has Leon take the other route).
There are actually footprints from the El Gigante scattered about the area.
The door to the Lift
(Locked door sound) It won't open. It must be locked.