I arrive at around 7 AM, and depart for home (San Francisco, CA, USA) at around 4 PM. I guess my main question was just whether it was too difficult to get into the city and back into the airport (and back through security) to make a short hop (and $50 transit visa, I suppose) worth it.

I'm not a big shopper, but I like oddities, culture, and food, in approximately that order. A single interesting site (cultural, historical, or weird--anything short of a major museum, which I'll likely be too tired to enjoy) combined with a good lunch would likely satisfy me. Oh, and I'd prefer something relatively easy to get to/from, and to describe to a taxi driver, as I sadly speak no Chinese (although I have a pretty good ear, and speak some other tonal languages).

Thanks for any advice!