An abandoned church located on the Nahant peninsula, northeast of Boston. A level-dependent mirelurk can be found nesting near the rear of the chapel, by the coast. Raiders also patrol the area. Gunners can spawn in the Nahant Bar and Restaurant, who will engage a Commonwealth Minutemen patrol in combat if they get too close.
- Appropriation: When speaking with Evan Watson of the Institute Advanced Systems section, he'll tell the Sole Survivor he is impressed with the Brotherhood of Steel's technology and that the Institute could learn a lot from it and asks for help in finding some blueprints.
- Treasure Hunt: The Sole Survivor finds a settler's note that suggests a large number of caps or chems may be stashed nearby.
- There's a miscellaneous quest associated with the chapel that is triggered by a settler's note.
- It is possible for a mirelurk queen to spawn behind the chapel.
The Nahant Chapel appears only in Fallout 4.