Alternatively you can take a camera, set up b&w or sepia mode and goto old parts of town ie. Fruit market in Yau ma tei and surrounding areas, some buildings not much change for the past 50 years. If have more time goto the New Territories namely Luk Keng (look for granny Ng) she still living like the past! You also get to enjoy the city.
If you prefer PM me and I'll send you some pictures I have took and you can use them.