A structure of wellness center comprises a support structure arranged to support a main bed at a first predetermined height from a floor of the room in which the structure same can be installed. The support structure has supporting side walls defining a wellness area, or grotto. Under the main bed, the wellness grotto has an entry through which a user can pass. Furthermore, a secondary bed is provided housed within the wellness area, or grotto, under said main bed at a second height from the floor of a room, with h2<；h1. A treatment bath is also provided arranged under the secondary bed and slidingly mounted on a frame to pass from a withdrawn position, in which it is arranged under the secondary bed to a protruding position in which protrudes from the secondary bed.
