– A Visit to the Pyramids:
This is one of the most extensive archaeological sites comprising many important monuments such as the Step Pyramid of Djoser, Pyramid of Unas, Pyramid of Sekhemket, Mastaba of Ti and the deep underground Persian Tombs. Once you’ve seen the Pyramids in daylight, If you want a different perspective, the Sound and Light Show gives you a chance to see them illuminated in the darkness of evening.
– Khan el Khalili Market:
The souk dates back to 1382, when Djaharks el-Khalili built a large Caravan Serai in Cairo. In addition to shops, there are several coffee houses, restaurants, and street food vendors distributed throughout the market. The Al Hussain Mosque is also in Khan el-Khalili; Al Azhar University and its mosque are not far away.
Needless to say there are a gzbillion other things on can do in Cairo, but if you have only a day to spare like I did, these should suffice :))