The fabulous dream creatures, the Alebrijes, will be parading through the Centro Historico are of Mexico City. Check the Museo de Arte Popular Site for the route details.
For a few photos of last years event...
http://www.flickr.com/photos/garydenness/sets/72157602593128302/
Official Website: http://www.map.df.gob.mx/index.php?page=noche2008
Added by garydenness on October 14, 2008