Located in Mountain View, Google headquarters is open to the public and cool place to visit when in Silicon Valley. You can walk the beautiful campus with green space, public art and statues, and self driving cars. While there are no official tours and most buildings are only open to employees, Googleplex is a must see for techies and pop culture lovers. If you know someone with work at Google, you may be able to tour some of the offices to get a real perspective on the world's most cutting-edge technology pioneers.