See their website for a good description and photos.
Old Towne is a fun place to spend a couple of hours, browse some novel shops, ride go-karts and some other rides, grab a snack or a meal (Flipper's has excellent pizza). It is especially good to go at nite when the Disney parks close early.
If you are into antique and classic cars, they have a cruise nite every Friday and Saturday that gets quite a good turnout.
Steve