AL ULA, Saudi Arabia — The Coachella art crowd had arrived in the Saudi desert, and chic caftans in head-turning colors outnumbered abayas on the sand. At a buffet ornamented with cantaloupes carved in the shape of flowers, waiters tended a fresh-squeezed juice station and rows of dainty canapés. Across the gold-and-russet sandstone canyon, the...Read More