"If you're lucky, you've spotted one of the 500 bright red cubes that the Art Institute of Chicago has hidden throughout the city. Cube No. 22 is hanging out at Navy Pier, awaiting photos ops. Cube No. 121, found outside Hostelling International Chicago, has since traveled to San Francisco and Seattle. If your daily commute takes you through Ogilvie Transportation Center, there's a chance you've stepped on cube No. 157; It's painted onto the main floor in an optical illusion.
