SAN FRANCISCO — Google is opening a virtual window into the secretive data centers where an intricate maze of computers processes Internet search requests, shows YouTube video clips, and distributes e-mail for millions of people.

The unprecedented peek is being provided through a new website unveiled Wednesday at www.google.com/about/datacenters/gallery/#/. The site features photos from inside some of the eight data centers that Google Inc. already has running in the United States, Finland, and Belgium. Google is also building data centers in Hong Kong, Taiwan, Singapore, and Chile.