Beijing Golden Triangle

Ok, time to come clean...I need info on these places, before September...so, anyone who's been there,please, share your story....i.e what to see, what to do..anything else of interest

1)Tiananmen Sq...ok, so there was bloodshed...anything else?

2)Forbidden City...emperor's palace, kan?

3)Imperial Summer Palace...another palace?

4) Beijing zoo...other than panda's, anything else there?

5) Great Wall...yea, it can be seen from the moon...and?

6)Iuyongguan...no freaking idea what this is

7) Ming Tombs....I guess they are...errr....tombs?

8)Temple of Henen?...Henen? Henew?

9) Underground city........sounds like a mine...is it?

10) Tianjin...other than No.1 in Tianjin ( the movie, the instructor) what else to see ah?

All info will be appreciated...thanks!