建築物位於小山丘旁，大體分為上下兩部分。繞到山丘上，可以從「大西洋辦公室」牌子地下的牆洞進入。建築內部是一些損壞的終端，The first sub-level has multiple holes to the basement; one is booby-trapped by a pair of laser tripwires. The lowest floor can be accessed in one of two ways: either by falling through the hole in the floor in the eastern room, or by jumping down the elevator shaft and using the hatch on the elevator cart. 建築內部的敵人有幾隻屍鬼。
The second floor is accessible by walking up the hill around the building and entering through the hole underneath the "Atlantic Offices" sign. The elevator shaft is accessible here, and there are several holes in the floor that lead to the main level. There is a room with a locked security door here that is controlled from a nearby terminal.
The Atlantic Offices appear only in Fallout 4.