It's not always easy to escape to a beach but the Poller Wiesen are the closest thing to it. Head over here on a summer night for an break from the heat near the Rhein, a barbecue, and a million other things with a perfect view of Cologne.
If you have the time to enjoy a relaxed evening out of the main city (but still with a perfect view of the city) and a bring your own picnic, this is the place to spend your time in the summer. Bring a frisbee or a couple badminton rackets to join in the fun.
The Poller Wiesen are best in summer but even in winter they offer stunning views of the city and a good place for a walk.