Feria del Arroz y el Cangrejo Food and drink · Isla Mayor, Comarca Metropolitana de Sevilla, Seville Rice (9,614 ha under cultivation in 2014) and the red crayfish of the marshes are the basis of Isla Mayor's cuisine and economy, celebrated in an annual fair around 24 June. Photo: File:Les_plantes_cultivades._Cereals_(2008).djvu: Miquel Pujol Palol derivative work: Joancreus (talk) (CC BY-SA 3.0) What to see and do in Isla Mayor