Seling Deep is a circular lake twenty miles west of Kyne. It is almost perfectly round, and averages four miles in diameter. Aesedran scientists are divided whether it is a volcanic caldera, or an impact crater. It is very deep, one of the deepest bodies of water on the Invinni continent.
The Palace of the Empire sits on its eastern shore and the Deep is surrounded by forest and parkland. Seling Deep and the lands about are the exclusive preserve of the Emperor and trespassing is death. It is the resting place of many Emperors and their families, and some of the resting was performed involuntarily.