Peaceful Stay in Rishikesh for Mental Relaxation?

Hi folks, I’m planning a 3–4 day stay in Rishikesh with my parents. The main purpose of the trip is to give my mother some time to relax and heal. She has been through some very difficult and emotionally draining life situations recently, and I just want her to have a peaceful change of environment.
I’m looking for a place that offers a calm atmosphere, with opportunities for yoga, meditation, spirituality, or simply being close to nature.