It could be quite cool to have some looping ambient AUDIO at a few key locations around the map, so that even when the player is in the darkness, and a bit lost, they can use the audio they can hear off in the distance as a sort of "approximate compass" to find their way to the Graveyard, for example.
This could even just be simple things like, one location has frogs croacking there, one location has an owl hooting occasionally, there some wind blowing up on the hilltop. And the player can start to use these as (an almost subconscious) way to orient themselves around the world.