Baiwangshan Forest Park is good. I just took my mother there in May.

The first half of the park is artificial landscapes, hills, paths and pavilions;

After going up the mountain, there are many open scenic spots, unlimited, in several directions;

Go back to the mountain, and there are dirt roads, which are close to nature. There is a big lawn in the mountains behind the mountain, and tents, camping and badminton are all very good.

follow the wild mountain, and you can go around the back door.

Another recommendation is the Forest Park (north of the Bird's Nest). It's big, not too many people, pure natural scenery.

Chaoyang Park is also very beautiful, especially in autumn, with beautiful maple leaves ~