We will be in Cadiz the Day the Seville Feria de Abril begins. This is from the Frommers Website
Seville April Fair
The fabulous Seville April Fair. © Ayuntamiento de Sevilla
when: 20 - 25 Apr 2010 (annual)
where: Seville
cost: Various; some events are free
time: Daily all day
Seville celebrates its April Fair (Feria de Abril) with a dynamic programme of events. Watch traditional horse parades clip-clop through the city, click your castanets at round-the-clock flamenco parties and try Manzanilla sherry in one of the feria marquees.
On the south side of the Puente de la Barqueta (bridge), which crosses the Río Guadalquivir, there is a canvas city known as Real de la Feria. There, over 1000 brightly coloured marquees are covered in decorations and paper lanterns, becoming a temporary home to thousands of revellers, packed day and night with flamenco dancers.
Many marquees are hired out to private functions, hosted by families, clubs and companies alike. These require you to have an invitation, but there are plenty of others and you can roam freely - all have their own bars. Be sure to order a chilled Rebujito, a refreshing mixture of Manzanilla sherry and Sprite unique to Seville.
At night, seek out some of the many flamenco events on offer. The majority run until 9am the next morning - some sevillanos turn up clad head-to-toe in flamenco costume and have no problem dancing all night. Try learning a trick or two from them.
Make sure that you get some sleep so you can watch the Paseo de Caballos (Procession of Horsemen and Carriages) at midday. Horses and beautifully decorated carriages parade in shining colours throughout the city, with their occupants in fantastic flamenco dress. Every evening bullfights take place at the Plaza de Toros de Maestranza de Caballería, known as El Catedral (Cathedral).
Flamenco and bullfighting represent strong cultural traditions in Andalusia and the April Feria offers a unique insight into the character and atmosphere of the region. However, if you find the practice of bullfighting distasteful, then this part of the celebrations is best avoided.