Part of his brain told him that he knew perfectly well what he was looking at and what the shapes represented while another quite sensibly refused to countenance the idea and abdicated responsibility for any further thinking in that direction.
-- Douglas Adams, The Hitch Hiker's Guide to the Galaxy
So you've been accepted to grad school in Astronomy at Cornell and now you want to visit to check us out. Most prospective graduate students visit on the assigned `visiting day' which is usually in early April. Others come at different times, and some (especially international students who might have large distances to travel) never see Ithaca or Cornell before their arrival in August.
If you do visit you will want to make the most of this opportunity to make your mind up about Cornell and Ithaca. Graduate school will take a significant chunk of your life as a young adult, so is not something to be entered into lightly.
This page contains the collective advice of Cornell's Astronomy grads on what to do when you visit (this can be applied to your visits to other departments too of course).
Talk to as many people as possible. Not everyone will have the same opinion of the Cornell Astronomy Department so it makes sense to get lots of different opinions.
Ask lots of questions. For suggestions on good questions to ask, see the links below.
Try to experience graduate student life. Many prospectives stay with current graduate students to get to see what sort of lifestyle we have here in Ithaca.