West Side Market is simply amazing. You're not a Clevelander if you haven't been. Saturdays can get pretty packed, so make sure you come early or go later. The produce is fresh, and the baked goods and cheeses are delicious. Very cheap too. The falafel place in one of the corners has some of the best falafel I have ever had! Even if you don't plan on getting anything, it's just fun walking around and seeing everything that's offered.