Korea is one of the most heavily cultivated places I have visited. Every bit of flat, arable space seems to be used for a garden, veggies planted into odd-shaped plots between buildings, by train tracks, along the road, and in back/side/front yards. Some of these are for home eating, but lots are commercial, in that there are roadside veggie stands everywhere. It is possible to see folks head carrying massive baskets of veggies on the super modern subway at rush hour so that they can sell produce downtown. Awesome!