Moffett Field Museum

Sign with arrow directing visitors to the Moffett Field Historical Museum, with Hangar One visible in the background, within the secure area of the NASA Ames Research Center campus in the Silicon Valley town of Palo Alto, California, August 25, 2016. Hangar One, which is among the world's largest free-standing structures, was leased to Google Inc affiliate Planetary Ventures in 2016 (along with Moffett Field) for 60 years at a cost of $1.6 billion, contingent on the company refurbishing the structure, California. (Photo via Smith Collection/Gado/Getty Images).