Extra Day in Cairo

I want to hear from you!  We have an extra day in Cairo. Here are some options:
#1 - Travel to Alexandria and see the Catacombs, etc.
#2 - Travel to the Al Fayyoum Oasis
#3 - Travel to the Nile Delta and Port Said

Our tour guide is from the Al Fayyoum Oasis and his family still lives there.

Let me know what you think we should do (because I cannot decide).

Thanks!