Whilst there are a few ferias around the island such as at San Isidro, San Antonio is by far the largest feria as they make use of a sizable piece of land with a church plonked in the middle. When I say 'the largest' I mean that over 2,000 people turn up to join in with the fun - coaches, buses, cars, motorbikes, caravans, walkers and lots and lots of people with tents! In fact, one year when it was a four-day event (normally it's spread out over three days), we made camp in our Land Rover for two nights. At the time we loved it ... but that was ten years ago :)
However, the main thing about both the feria at San Antonio and San Isidro is the cattle and other farm animals, namely goats and sheep. Plus horses, mules and those oh-so-sweet donkeys!