Agricultural tourism is a very popular thing amongst Taipei residents. For between US$25 and US$40 per person you can join an organized excursion from Taipei Main Station to a farm where you can pick your own fruits and vegetables. As a bonus, there are often a couple “side stops” along the way, usually to a street market or museum. If you have a free Saturday or Sunday and the weather is nice it is one of the best ways to get some clean air, exercise, and come home with something healthy to eat (minus anything picked up at any street markets you stop at along the way, of course).
So, a couple Sundays ago my family along with some family friends went on one of these day trips to a turnip farm in Taichung in central Taiwan, leaving from TMRS.