<p>I don’t know about the admissions office. You should contact them directly for info. But other things, ways to look around: (particularly if they are closed.)
Go to the web sites for the university and download a map.
Go to Faunce House. (now officially renamed the Stephen Robert Student center, but everyone still calls it Faunce). this has a nice take out spot, and the lounges there are good places to meet up/back. There is an info desk there with maps (usually) and likely a student manning it that may even be able to find someone there to give you a brief unofficial tour. Also, don’t be afraid to be bold when you wander into buildings of interest to you (libraries, certain classrooms may be open) and ask people if you can be shown around/ ask students questions. (even if it is where is?? and it will start conversations)
Take a stroll down Thayer street (but a lot of the people there in the summer will be “townies”, so I would recommend eating at least a snack some where on campus to be more likely to get those spontaneous chats with a student.
While on Thayer, stop in the bookstore. Buy something (overpriced, but limited source) Brown to wear back at school, or your home town. (Another way to find people from Brown to talk to!) The bookstore is pretty boring, but you may also find people to chat with there.
In general you likely want to take a loop: across the main green,(maybe detour down to the Rockefeller Library if it is open,) through Wriston quad, (back way through Lincoln green,or through soldiers Arch, ) or up or down Thayer street, (getting a Dell’s lemonade if you are hot by now from a truck.), stopping at Sci Li, Computer center /MacMillan hall (lecture hall) etc as interested or as they are open. Swing through Pembroke,(a peek in Alumni hall?) back down Brown street to Faunce. (or reverse order.) add stops in areas of interest. The most interesting things are not going to be the mostly empty in summer buildings, but the students you can find around to talk with.
I’ve left out a lot of things to check out, but you should peruse a map, or better talk to students about what you want to see either there or in advance, so this is just the “basic” loop.</p>