It is impressive to watch the ISS orbit past with the shuttle nearby as the shuttle approaches or disconnects from the ISS. Keep a watch on that Heavens above site for the viewing schedule when that last shuttle in up.
I saw that same thing two flights ago. If I held my hand up to them as they raced across the sky, they were about a thumb's width apart. Something pretty magical about that sight in this old guy's young heart. ;-)
I’ve seen the ISS a few times. What was cool was seein MIr and the Shuttle pass over. I saw Mir and I believe it was Atlantis after it undocked. I watched the post undocking press conference and at the end of it, Frank Culbertson, then the head of the US side of the Shuttle-Mir program said they would pass over Houston at whatever time it was. I live in Memphis and looked at the orbital track and was going to pass over me on that pass. So, about three minutes after passing over Houston, they came ove. Two brilliant points of light flying in high-speed formation. Couldn’t miss them. Saw them horizon to horizon. Really pretty.