Antiques Mall of Madison is a labyrinthian collection of vendor stalls housed under one roof. If you need something old, you can probably find it here. I strolled through at a leisurely pace and discovered everything from mountains of costume jewelry to nifty old cameras to walls and walls of (surely possessed) dolls.
My favorite find was probably the shelf of Fire King Peach Lustre glassware - I think I'll have to go back and treat myself to a bowl or two now that I know it's safe to eat from [I tried doing some research at the mall, but my phone was having trouble getting service in the huge hall]. The pearlescent sheen and orange-y peach hue are just too good to pass up.
Next time there's a rainy day or you've got a lull in your Sunday afternoon, embrace your inner septuagenarian and see what floats your boat from the good old days.