More than forty years ago, artist Michael Heizer dreamt up a work called Levitated Mass. It consisted of a gigantic boulder set within a long, horizontal slot in the ground, marking an early example of land art. He even began making it in a desert in Nevada, but one of the cranes being used to hold the 120-ton rock gave way, and the work was left unfinished—until now.

LACMA commissioned a version of the work for permanent installation in its backyard, where a 340-ton, two-story tall boulder rests atop a 456-foot-long trench that’s tall enough for visitors to walk beneath. The rock, which was extracted from a Riverside quarry wall in 2007, waited patiently for years until this spring, when it began its monumental journey to mid-city L.A. Over eleven days, it traveled 105 miles through twenty-two cities to its final destination, fielding rumors that it is the biggest or second-biggest thing ever moved by man. A blog by L.A. County Supervisor Zev Yaroslavsky complied stats from the excursion, including these:

Top speed: 5 mph
Total gallons of diesel fuel burned: 2,250
Miles walked beside the boulder by Emmert crewman Joe Schofield: 75
Blistered toes on Joe Schoefield’s feet: 3
Traffic signals moved, removed, or replaced on one night between Long Beach and Carson: 41 poles and 12 signal arms
Port-A-Potties in the convoy: 1
Times cleaned in 11 nights: 5
Marriage proposals next to the Rock: 1
Attempts to crawl under the Rock by members of the public: 1
Tacos sold at Patricia’s Mexican Restaurant across from the Rock on Wednesday: 4,000
Tacos sold at Patricia’s on a normal weekday: 300
Number of cars towed on Wilshire to make way for the Rock’s arrival at LACMA: 10
Time the Rock was delayed because of illegally parked cars: 1 hour, 33 minutes
Lost palm trees: 2

Last Sunday, the rock-as-art was unveiled to the public, drawing mixed reactions spanning awe to disgust to critique of its $10 million price tag. As a thank-you for Californians who had to deal with the road closures and delays due to the boulder’s travels, LACMA is offering free entry until July 1 to residents who live in zip codes the mass passed through.