A look inside tech companies' striking offices June 21, 2013 -- Updated 0232 GMT (1032 HKT) Zynga, San Francisco Skype, Palo Alto, California Google, Boulder, Colorado Google, Amsterdam Facebook, Menlo Park, California Alibaba, Hangzhou, China The tech industry has been setting the bar high for office aesthetics Tech companies, especially Google, are known to offer unusual employee perks Some of the perks are built into the offices, such as a rock-climbing wall or an indoor bicycle lane (CNN) -- Google is well known for its elaborate campuses, offering employees extensive food choices, free haircuts, subsidized massages and plenty of ping pong. Some of the perks are built into its work spaces, such as a rock-climbing wall at its Boulder, Colorado, office or an indoor bicycle lane in Amsterdam. But overall, the tech industry has been setting the bar high for office aesthetics, using bright, open spaces and striking art. Here is a look inside -- and, in some cases, outside -- the offices of a few major technology companies. Take a look inside some of the offices of Silicon Valley's most well-known companies. June 20, 2013 -- Updated 0350 GMT (1150 HKT) Over the next few years, offices will start to have robots roaming around on wheel.