This is MacArthur Park the Westlake area of Los Angeles.
These pillars are made of some sort of steel, with holes cut in them in what are evidently Mayan numerals. (Bars are fives, dots are ones, and those hamburger football things are zeroes. Groups of bars and dots composed vertically in a base-20 system.)
But why? What do the numbers signify?
The LA Parks and Recreation web site for MacArthur Park features these pillars prominently, but offers no explanation. Does anyone know what is up?