Hey! I am here with some lovely info that I wasted my time doing for everyone! đ
Customs:
The Parking Lot of dorms, you can't miss it
Reserve:
Righthand corner of the map, around the blue marker on the photo provided in the link
Interchange:
Nearby Scav Camp Exfil (The Co-op Exfil)
Lighthouse:
Nearby the building on the left of the map, marked with a tick on the link provided
Shoreline:
Literally in the Centre of the health resort yard.
Woods:
Nearby sawmill on some floating containers
Source: https://www.reddit.com/r/EscapefromTarkov/comments/roc3ul/all_christmas_tree_locations/