We were doing more work on the dome shutter rails over at the 200-inch telescope last week. (By that, I mean the "royal we", as it wasn't actually me doing that work.)
Here are two members of the Palomar day crew as they paused to have their picture taken:
The dome is so big and they look so small, that I decided to give you a larger view of just the people doing the work.
They still look pretty small, don't they? Most people just don't get how big (135-feet high) the dome is until they experience it for themselves, but maybe this shot will help.