Stromberg's obsession with the ocean encouraged him to construct Atlantis. To all extents, the structure is a palace in both scale and opulence. Similar to the grand volcano fortress of Blofeld, a major advantage of Atlantis is its ability to remain undetected; in the latter's case by submerging itself underwater so as not to be seen or detected. Located off the coast of Sardinia, Italy, Atlantis has everything to support life above and below water for any length of time. In fact, Atlantis is more like a city, able to support dozens if not hundreds of people.
Behind the scenes
According to production designer Ken Adam, for The Spy Who Loved Me the renowned set designer decided to experiment with curved shapes for the scenery, as he felt all his previous setpieces were "too linear". This was demonstrated with the Atlantis, which is a dome and curved surfaces outside, and many curved objects in Stromberg's office inside.
In October of 1976, the second unit travelled to Nassau to film the underwater sequences which included the Atlantis model. Stromberg's shark tank was also filmed in the Bahamas, using a live shark in a saltwater swimming pool.