El Gezira Tower was build in 1961. It is 187 meters tall, and is located in the center of an island in the middle of the Nile River in Cairo. It has a very nice view of Cairo from all around. You can see the old Citadel, The Pyramids, old Cairo, the Nile river flowing from the south and into the north, and a lot more.
Here are some pictures of the tower, and from the tower