If anyone's interested, the multicolored group of buildings you see when first opening this page is one of Google's offices at Central St Giles. I've been there many times for training/meetings/the free lunch and it's amazing.

They have a 360 degree gym at the very top, along with multiple roof terraces, a huge cafeteria (of course) and soundproofed meeting rooms with funny names.

One of the office floors is styled like a submarine, complete with big metal doors with valves on them. They share the space with multiple Media Agencies and other companies, so you would never know it was there. It's quite surreal and invokes a ton of envy.