#1 Under the stairs
setpos 501.231445 -352.066864 191.670105;setang 14.276165 154.671112 0.000000

#2 Telephone behind the fence
setpos 582.057922 -737.046875 352.248199;setang 20.083540 84.801773 0.000000

#3 Secret area on edge of the houses
setpos -1748.374878 1025.958496 316.286102;setang 7.238448 -45.296749 -0.000456

#4 Side of the stairs in the red building
setpos -562.953003 182.207550 284.286102;setang 39.277428 -51.207394 0.000000

#5 End of a pier on the right wooden pillar next to the giant yellow container
setpos 524.718201 1458.036621 160.286102;setang 15.067924 70.257500 0.000000

Activates the secret room inside the yellow building, next to the enterable red building. (You'll need to noclip inside)