This is front view of the underground section for Steinway & Sons. The building meant to represent a knot, this to give an elaborate criss-cross pattern of overlapping structures that intersected with each other.
This is a perspective view of both top and bottom section of the building, included in the image is the representation of site. Instead of embedding the structure in the site I would excavate the site and leave the structure exposed so that it can be viewed from the outside.
This photo shows a section of both the top and bottom if the structure and through the site.
For the bottom section of the structure I have provided holes in the top to act as light wells to provides natural light into the structure, and they flow all the way down through to the bottom.