Every year, from
July 6 through July 14, a
festival is held in
Pamplona,
Spain, to commemorate
San Fermín. Marked by daily
bullfights, it was made famous by
Ernest Hemingway, who wrote about it in
The Sun Also Rises.
In order to get the bulls into the bullfighting arena, they are run from outside the city, through narrow streets, to the arena. Brave and/or stupid celebrants race ahead of the bulls through the streets, usually avoiding injury or death.
There's also lots of partying, and champagne, and a bunch of people wearing white, with red scarves.
I haven't been yet, but hopefully 2001 will be my lucky year.