Located in the Hong Kong UNESCO Global Geopark in the eastern and northeastern reaches of New Territories, teeny-tiny Sharp Island offers a great way to get a gander at Hong Kong’s fascinating ancient geological past. Set off on a two-mile trek that weaves around the island. The walk starts at the pretty crescent-shaped Hap Mun Bay Beach, also known as Half Moon Bay (pack your swimsuit and towel), and ends at the Sharp Island Pier. Along the way check out the volcanic rocks—some even resemble pineapples. For fun, when the tide is low, walk across the rocky tombolo, or spit, to the tiny islet of Kiu Tau. To get to Sharp Island, take MTR Diamond Hill Exit C2, then hop aboard bus 92 to Sai Kung Town; next, take a 15-minute kaito (ferry) boat at the Sai Kung Public Pier to Hap Mun Bay; then leave the island from the Sharp Island Pier.