Tai O is a village on the western shore of Lantou Island.  Car traffic is limited to those who have special permits--indigenous people of Lantou, so the bus is the best way to get there.  I've managed to get there two times while in Hong Kong this time and enjoyed the bus ride both times, going through the pass over the mountains from Tung Chung and then along a narrow road along the southern shore of Lantou Island.  The fishing village is known for its stilt homes, but also you can see mangrove swamps in the estuary right next to the bus stop. Mangroves are found in areas where there is a mixing of salt and fresh water.  It is hard to imaging that you are in Hong Kong when you walk through the streets of this village.