The Domain of Amun was a network of cult and mortuary temples linked by processional routes. Processions were held to mark festivals. They began in the land of the living, on the Nile's east bank, crossed the river by royal barge and went to the mortuary temples in the land of the dead, on the west bank. Routes were treated in various ways: canals, roofed causeways and pavements lined with trees or statuary (eg sphinxs). Temples were built on the margin of the black land (within the flood zone and therefore available for agriculture) and the red land (mountain and desert).