Locations

Overview
Whispering Hills adds many new locations to the world of Fallout 4, mostly in the titular dreamworld of Whispering Hills. Several of these locations have alternate Hell versions, where the world is turned into a much more nightmarish landscape with more powerful enemies and classic Silent Hill aesthetic.

Whispering Hills
The largest cell added to the mod is the town of Whispering Hills. It is a town shrouded in fog and inhabited by many monsters. The actual overworld itself is relatively safe, with the most dangerous foes you will have to deal with being along the like of mumblers and grey children.

The map uses buildings, gates blocking the roads, and a giant trench in the middle of the town surrounded by invisible walls to keep players out (we all tried jumping in, admit it).

Dunwitch/Parson's Hell
The first new cell you will encounter in Whispering Hills is the Dunwitch/Parson's Hell. It used to be accessed through a hole in the wall outside of Lorenzo Cabot's containment cell in Parson's State Asylum, but it was then moved to Dunwitch Borers, in a side path within the waterlogged tunnel at the end of the dungeon with the strange statue at the bottom. It is the same Hell, just in a different location.

The first cell in this Hell consists of two long hallways that lead you to first deeper into Hell and then later into the world of Whispering Hills once you obtain the rattle at the end of Hell. Both Hallways will cause you to lose all items in your inventory halfway through crossing, so be sure to store your treasures in the box provided as they will not despawn. The first hallway is filled with radios playing ominous messages and creepy noises - despite the intense atmosphere, this cell is actually completely safe. Through holes in the brick walls, you can see out of bounds into the glitchy interior skybox, which actually adds to the atmosphere rather than take away as it usually would.

Out of Bounds secrets
The Whispering Hills mod has many oddities out of bounds on the maps, usually only accessible through glitching through the map in select places or using the tcl command to toggle collision. This is not by any means a comprehensive list, as these are just the few I found myself by messing around the game.

Whispering Hills secrets
There are numerous secrets hidden throughout the out of bounds areas of Whispering Hills, mostly dev stuff.

Asset Town
By either clipping through the walls, deleting them, or just using the gate key found outside the upcoming sewer entrance, you can go out of bounds in the town of Whispering Hills. By following around the perimeter of the town, being careful not to fall into the endless flat plain created in new world spaces, and keep going around until you see the roofs of some houses sticking out in the fog below you and jump down. At first it resembles another town like Whispering Hills, but there are no roads and all the houses are different. As well, around the side you can find several chairs and tables and other random pieces, all one of a kind. Indeed, this area is a place where Manga compiled all of the houses and furniture in one place so he could pick them out easier.

Random Roads
Outside of the map, you can follow the roads to a strange out of bounds area with just more road. The roads go around in a sort of grid pattern, with smaller roads connecting them at points. They don't seem to serve any purpose, and it's unknown why exactly it's there. The ground is just the default dirt texture and there are no junk or decorative items to be found, just road.

Whispering Hills Sign
If you've seen the trailers, you may have thought of how you never got see the Whispering Hills sign featured there in game (aside from in the Dunwitch/Parson's hell). Well, it is actually there, just out of bounds. By clipping through one of the junk walls surrounding the border of Whispering Hills, you will see a small amount of random buildings and such meant to be seen from the playable area. If you follow the road, it eventually turns to plain forest and road with surprisingly well made terrain for an area most players will never see. After a short walk, you will find a large Welcome to Whispering Hills sign the same as featured in the trailers. If you continue down the road some more, you will find that road abruptly ends into a cliff leading down to the true out of bounds area, a mere flat plane of dirt with no content.

Trivia
-The old hole in Parson's was planned to be have a sign reading "THERE USED TO BE A HOLE HERE BUT IT IS GONE NOW" on the wall plugging it, but cannot be found there in game. However, you can find a sign reading this in the Other Hospital.