Meditation rides
As a runner, my mind would wander and I would come home with tons of ideas. However the effort was typically rather intense, and required substantial focus on the exercise.
I would combine exercising with a more purposeful meditation practice later.
After a week of focussed cycling, it is clear how you can combine both. Unless you are climbing a mountain, the exercise is more repetitive, allowing your mind to wander easily. This is especially the case on separate cycling trails without the dangers of a public road.
Cycling is where exercising, sightseeing and Calm, the app, meet. Now I need to perfect recording thoughts while riding. Day One perhaps will do the job.