Four great Araññas are often mentioned in literature (E.g., M.i.378). They had once been the sites of very populous and prosperous kingdoms, but had later been destroyed by the gods because of offences committed by their kings against holy men.
The four Mahā Araññas are: Dandaka°, Kālinga°, Mejjha°, and Mātanga°.
Details of these are found under each respective name.