Koreans are good at exercising. We men in their 70s dressed like the biker above cycling around town. The men and women are also hikers and they come prepared with all the gear: backpack, walking sticks, water bottles, hiking shoes, etc. etc. etc. No wonder 92% are thin and trim!
Land is at a premium in Seoul and so you will see plots like this filled with a variety of vegetables. We get the best produce! Very fresh and the greens especially are varied and unusual.