According to the drone footage embedded at the bottom of this post,

Apple Park is the official name for the company's 175-acre headquarters in Cupertino, California, what was previously referred to as Apple Campus 2.0 and "The Spaceship." The last time I posted about Norman Foster's design was about a year ago, in regards to the 10-1/2-foot-tall by 46-foot-long panels of curved glass, a huge engineering feat. At that time there were also reports about "two glass doors that span four stories high," but no images. The latest drone footage reveals what appears to be those doors, found at the 2:30 mark in the below video:
The April 2017 drone footage of Apple Park:

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