Here is a great link to a YouTube NASA video, shows a detailed tour of the ISS interior that is well worth watching.
It features former Commander of the International Space Station, Sunita Williams of NASA. The tour includes each of the station's modules and research facilities aboard the orbital outpost.
The ISS regularly passes overhead, usually every day or so, if you check the times. I have seen it looking really bright and close over the UK; though its orbit is around 400km from the surface. If on twitter easily can get the times kindly tweeted to you, for example if you follow
Of course a wealth of background information on the NASA site.