Wet market is the must see in Penang. My grandmother and my mother shop in this market so I am pretty familiar with this place. It is filled with energy every morning and night. In the morning stalls selling all you need to run a household can be found in this market. Goods include fresh vegetable and fruits (both local and imported), seafood, meat, sundry, etc.
At night, it is an entirely different story. The market turns into a food paradise with the place lit up and hawkers selling all kinds of Penang famous hawker food. Tau kua chen (fried bean curd) is finger-licking good!