It has the look of a recompression chamber for hyperbaric medicine. Was this shot taken in an abandoned hospital facility? Some time ago I remember reading that there is some sort of therapeutic effect for some conditions of being put under higher than atmospheric pressure and breathing gas mixes with great than normal o2 concentrations. It does not look like a diver's recompression chamber as it doesn't look like it's designed for the much higher pressures used in such situations.
Just my three penneth.
PS... please note - REcompression chamber... the well known term "decompression chamber" is a misnomer as the chambers above water used to raise pressure higher than atmospheric are known with the suffix re and not de. I only mention this incase someone with their PC head on corrects me! Personally I always call them all decompression chambers cos I'm a Jack Custard fan!