| ||For the faction, see Acadia (faction).|
The air around Acadia is fresh and free of fog. The observatory is situated at the top of a small mountain.
When entering through the front door there is a corridor with some stairs leading down on the right, Faraday's office/laboratory on the right past the stairs, and then the corridor leads directly into what was formerly the telescope room/planetarium of the observatory. DiMA can be found in this main room, often with Chase and Faraday. This circular room is lined with servers along the walls and has some stairs leading up to a mezzanine. There is also a door (locked initially) which leads downstairs.
Continuing downstairs to the next floor is Kasumi Nakano, who has fled to Acadia from the Commonwealth, believing that she is actually a synth. There are some terminals and storage rooms located down on this floor.
- Acadia storage key, in the room with DiMA. Go up the stairs and follow the platform around the room until the end. There stands a table with the key on top of it.
- Faraday's program - on Faraday's terminal during Where You Belong.
- Faraday's terminal password - In the observatory.
- Islander's Almanac issue #4 - In the back of Dejen's counter on the second shelf, next to the group of candles. Stand on the inside side of the counter to see it.
- The unique weapons Sergeant Ash and Old Reliable - Sold by Dejen.
- Cog's journal - On a barrel in the corner, behind Cog in his store.
- Recon marine chest piece - Sold by Cog.
- Storage room notice - Posted next to the storage room in the north.
- Three mini nukes and two fusion cores behind a Master-locked door at the bottom floor.
- Worn key - given by DiMA at the start of Reformation. Opens Confessor Martin's hideout.
Behind the scenes
- The observatory is located on the real life summit of Cadillac Mountain.
- Acadia's name derives from the modern location of Acadia National Park.