http://www.thecitymarket.org/

Check Kansas City's City Market (continuously operating since 1857)

They've got 30 full time stores open (produce, seafood, restaurants, etc.) as well as Wed/Sat/Sun, they have anywhere from 130-160 vendors.

Plus the Steamship Arabia Museum is right next door...one of the coolest things I've ever seen. It's a museum involving (basically) a floating pre-Civil War Walmart that sank into the mud, and everything was perfectly preserved. Check http://www.1856.com for more info.

Anyway, KC's City Market it totally worth the trip.