It was a journey for the ages—all ages: a slow-moving procession through 22 cities and four counties, beginning in a Riverside County quarry on Tuesday, February 28, and culminating at the Los Angeles County Museum of Art on Saturday, March 10. Along the way, thousands of spectators turned out to marvel at artist Michael Heizer’s 340-ton boulder and its massive custom-made transport. At the museum, the rock will be attached to a concrete channel, creating the illusion that it’s floating, or levitating, overhead. “Levitated Mass” is expected to open as a permanent LACMA installation in late spring or early summer. Here’s our video account of one of the most memorable moments in L.A.’s art history.