Seireitei

Seireitei is the very center of the Soul Society itself, literally. At Seireitei's northern, southern, eastern and westernmost points are expansive courtyards leading to truly massive gates into the cardinally respective quadrants of Rukongai. The walls of the Seireitei are made up of sekkiseki stone, a material known to both absorb and negate spiritual energy, thus making it impossible for Reishi to be gathered effectively within the Seireitei. This stone is also solely responsible for the Shakonmaku, the spiritual barrier that covers the vast wholeness of the Seireitei in its protective bubble, preventing anything spiritual from breaching it and gaining unwanted and unauthorized access into the Seireitei.
Baozhai Manor, Tsuyosa Manor, Koga Manor, Shimazu Manor

Gotei Thirteen Barracks

The Gotei Thirteen, the Soul Society's chief military force, occupies a significant portion of the Seireitei surrounding Sōkyoku Hill. Each of the Thirteen Court Guard Squads occupies a plot of land where the Captain's subordinates go about their day-to-day activities, duties and missions to contribute to the overall goal of the Soul Society's military.
First Division Barracks, Second Division Barracks, Third Division Barracks, Fourth Divison Barracks, Fifth Division Barracks, Sixth Division Barracks, Seventh Division Barracks, Eighth Division Barracks, Ninth Division Barracks, Tenth Division Barracks, Eleventh Division Barracks, Twelfth Division Barracks, Thirteenth Division Barracks

Rukongai

Rukongai is the Soul Society's purgatory, essentially. Split into four sections: North, South, East and West with each section being furthermore split into eighty districts each - with the higher your numbered district, the farther you are from the Seireitei - the Rukongai serves as a temporary home for all the dead spirits whom are awaiting rebirth into the endless cycle. Those districts which are closer to the Seireitei benefit from excessive wealth, security and order whereas the districts farther from the Seireitei are plagued with gang activity and other criminal-type behavior.
Northern Rukon, Southern Rukon, Eastern Rukon, Western Rukon, Veratrax Peak

The Shinigami Academy

In place for two-thousand years, the modern Shinigami Academy recruits and trains individuals whom are deemed worthy and possess the potential to become a Shinigami. Here, students are put to work on a five year course, studying the main disciplines of Shinigami ideology and combat, advancing to more specialized classes in subjects they do well in. By the end of their fifth year, it is clear which Division an Academy student is intent on joining and for graduation ceremonies, is inducted into a Division by the Captain of the Division whom they apply for. The building has been rebuilt over the eons.