I had been a life long cyclist, until I lost all my fitness by being unable to leave my mother on her own, (dementia); that cost me 8 years of near inactivity.
I haven't been able to regain my fitness to any reasonable level, & I just can't get up the hills or do the distances any more.
But, I used to go walking in the countryside too, & I can still do a bit of that, although not as far as I could before.
Motorcycling, specifically MotoGP. I used to race (almost sixty years ago!) and the way the sport has developed is just amazing. Back then 50bhp was considered powerful. The tyres were very similar to road rubber. Nowadays, you need at least three times the power and ultra-sticky slicks.
It looks excellent. I think there should be tours like this not only in the U.S. but also abroad because there are good roads to drive on, too. I prefer this tour: https://biketourjapan.com/ashikaga-self-guided/. I often go on this tour with my friends to have a great time and get many emotions. These experiences are incomparable, so I go on this tour every year. There I met attractive bikers who became almost my friends, and it was on this tour that I found my reliable partner, and we have been living together for two years now.