The Place of Desolation is the Redcloaks' former base, built by the ancient Hellans and Kovo, on the axis of Erdas. The base itself is a fortified volcano with built in rooms.
It was built on the axis of Erdas, and the The Evertree on the other end of the axis. However, the Evertree is on SouthernNilo, on the other side of the world, which means the Place of Desolation is on the north end of the axis. But, to get to the Place of Desolation, you would have to travel southward into the Frozen Sea.