Black Rock City is like a pretend city that only exists for a little while, once a year in the desert. People go there to have fun and be creative. They build big art projects and funny camps to stay in. There's no stores or restaurants in Black Rock City, so people have to bring everything they need with them. They even bring their own water! They also have special events like music concerts and parades. After a week, everyone packs up and the city disappears until next year. It's like a big pretend playground for grown-ups.