If you can't visit Palomar's big dome to see the 200-inch Hale Telescope in person you might be interested in seeing these amazing 360-degree photos created by jrbfoto.com. Be sure to give them time to load. Once they do then you can pan around, look up, look down, zoom in & out and have a grand ol' time.
The view from the observing floor.
The view from the inside catwalk.
Update: Hey, this was my 200th blog post!