FALLOUT 4 Hidden Locations and underwater treasure series
FALLOUT 4 Hidden Locations (Underwater Treasure 3)
INFO: (Make sure you have the perk that lets you breathe under water or you won’t make it there. It’s called Aquaboy and can be found in the endurance perk section)
Location: Near Boston Airport
From the boston airport, walk towards the shore and pass the big broken plane. Next to a tree on the ground you will find the message in a bottle with the treasure quest.
Follow the marker into the water and dive straight down once you are the spot. You can see a plane that has the treasure easter egg inside its cockpit.