The Burning Man event is held each year the week prior to the US holiday Labor Day in the Black Rock Desert of Nevada. There are no hotels as you are in the hot dry desert with about 49,999 other people.
The attendees cover the entire spectrum of humanity and cultures, but for the most part it is a very creative focused community of people. People really let their creative side go all out at Burning Man by showing a wide array of visual and performance art including some very unique designed structures, bikes, and mutant vehicles.
The event culminates in the burning of the large wooden Burning Man which is then followed by some cases of hangover, sunburn, and a long drive home to shower off the accumulated layers of dirt.