Lo Sol

Lo Sol (虚夜宮（ラス・ノーチェス）, taiyou; Spanish and Japanese for "The Sun") is the fortress located in Hueco Mundo and base of operations of Término Muerte, along with his commanders Yurina Kamida and Urakih Ikasoruke. They reside there with their army of Arrancar, the Eximo Espada and Los Cinco Dios.

Due to their immense power, Espada of Rank 4 or higher, as well as all Los Cinco Dios, are forbidden from releasing their Zanpakutō within Lo Sol. It is later justified by the battle between Perentorio and Kouhei, as their fight above the dome resulted in Lo Sol losing a good portion of its domed roof, as well as segments of the five towers.