What is the setting of The Last Continent: A Discworld Novel by Terry Pratchett?

The Last Continent by Terry Pratchett takes place on Discworld, a flat world that rides in space on the back of four giant elephants that stand on the shell of an enormous star turtle. By this twenty-second novel in the series, Pratchett gives little attention to the basic mythology, but concentrates on what is happening of Fourecks, the last continent, built from leftovers from another god's creation of Discworld, Fourecks is essentially unstable.