My favourite spot in Hong Kong has to be Big Wave Bay at the northeastern end of the Sai Kung peninsula. There are a bunch of ways to get there, but we usually start by catching a taxi from Sai Kung to Sai Wan Ting. The ride can be a bit hairy, as the last section is a winding single-track road, but when you start walking, you'll be rewarded with views across the High Island Reservoir.