Nestled just six miles west of the Magnificent Mile in a manufacturing district in Garfield Park, Metropolitan Farms is a thriving agricultural operation, producing locally-sourced tilapia, salad greens and culinary herbs year-round from within its state-of-the-art greenhouse. Learn all about this fast-growing company with a one-hour tour from one of the founders or a greenhouse manager, who’ll fill you in on their fascinating aquaponic system, which combines fish farming and a hydroponic growing system in a closed-loop facility without the use of synthetic pesticides or fertilizers.  Goldstar has discount tour tickets for every Saturday through the end of April.