FORM Arcosanti

FORM comes back from a year off to the only site it has ever used — Arcosanti, the half-finished desert arcology Paolo Soleri started building in 1970, two hours north of Phoenix. Twenty-five hundred people, no VIP sections, and no two sets running at the same time, which means the whole festival watches the same thing all weekend. Disclosure, Ben UFO, Avalon Emerson and Tycho carry the dance side; Lorde, Turnstile, Blood Orange, Adrianne Lenker and Kamasi Washington fill in around them. Cliffside pool parties by day, spatial-audio sets in the vaults after dark.