The Internet Archive is not purely digital -- there is a Physical Archive as well. But it's set up in an somewhat unusual way -- serving primarily as a place for things that will be digitized (eventually) or have been digitized, but might need to be re-done later for different purposes or with different or better technology. Unlike most archives, it's not intended for regular random-access.
It is located at 2512 Florida Avenue, Richmond, CA 94804. There is also a second data center, described as being on "Carlson Ave, Richmond", although the actual address is 380 Carlson Blvd (not Ave).
- https://clustrmaps.com/a/3vsfq6/ (identifies the address of the Carlson warehouse)
- https://archive.org/details/warehouse380carlson (various pictures of the Carlson warehouse)