Sharp Island, just a short ferry trip from Sai Kung, is the playground for thousands of locals and tourists every weekend. While the hiking isn't a big drawcard (it's only 2 km from one end to the other), the views over surrounding islands and crossing the tombolo to Kiu Tau islet at low tide (or high tide if you're adventurous) are worth the journey. Pro tip: avoid the overly crowded and rocky Kiu Tsui beach in the north and head to the quieter and sandier Hap Mun Bay down south. Better yet, avoid weekends altogether.