Up front are two office-type buildings and the entrance to underground storehouses and workshops. Above those are a patio and a park area. Behind the park’s semicircle fountain is big square opening above the underground plaza. On the next level up and new to this version are the lower Ayra Katrin dormitories. The arch roofed section in the middle is the commons area, flanked on both sides by the individual living quarters.
Below is the last version of the Tail Hill Complex posted (almost four years ago):
Here is an orthographic view of the entire tail hill:
Starting from the lower left and moving clockwise, the complex is surrounded by the National Square and a collection of circular gardens, Civic Square, Civic Hill, the Ayra Katin Library, Agwilcress Grain Factory, and Military Square.