Cairo is a busy and trafficked city, and it may all get too much - luckily there's Al Azhar Park, a true green oasis in the city, with fountains, landscaped gardens and views over the city. It's very popular with locals and families but it's also quite big and you should have no problems finding a quiet corner.
the most green , fresh and pure atmosphere kilometer in cairo .... try it @ sunset (y)
There's basically no green space in Cairo that's not a private club--and in a way, this park is private too, because it charges admission. But it's less exclusive than other green spots, and it has a beautiful view across medieval Cairo. It's a great place to hang out and people-watch--families come here with picnics and kids hang out and flirt a bit. And for women, it's a rare spot to hang out without getting too much attention. Still, it does feel a little resort-like, with piped-in music and lots of fountains. But I'll take it. Oh, and the restaurant here is quite good and not insanely expensive.
The park itself is very beautiful, and at only 5 LE per person, it's not expensive at all. Consider the fact it was once a trash heap and you'll be even more amazed at how awesome it is. Negatives: on weekends it can be very crowded with groups of young Egyptian men, which spell death to my enjoyment as a foreign lady (in my humble opinion), and it can be hell to get out here in the traffic. Prepare yourself for a long taxi ride and make sure he puts the meter on! While you're out here, see the citadel and take a picture of it at sunset.
Al Azhar Park
One of a handful of the Cairo's green lungs affording excellent views across the Islamic side of the city. There's a token admission fee to pay, but well worth it for some respite from the heat and smog. There's a lakeside cafe at one end and the Citadel View Restaurant at the other. The park is open daily from 8am to sundown.