Which period in history would you love to visit?

All of this chat about the Mayans has got me thinking more about different periods in history from around the world as well as different cultures. There have been so many civilizations around the world over thousands of years, so if you could, which one would you like to go back and visit and why?

If at all possible I would love to travel back to Ancient Egypt in order to watch the Pyramids being built and talk to the planners. My plan would then be to get in touch with the Discovery channel and others like them to point out where they went wrong and be extremely smug in the process.

Over to you.