One half of the Hong Kong UNESCO Global Geopark is the Sai Kung Volcanic Rock Region. It features a gargantuan 140 million-year-old rock formation that covers an area of 100 square kilometers. You can witness this extraordinary sight by joining a Geopark Tour, which will make a stop at the East Dam of the High Reservoir, where you can get a close-up view of the hexagonal volcanic rock columns and other geological phenomena like faults, folds, and dyke intrusions. If you want to hike around the region instead, visit Walk Hong Kong for the hiking tour schedules.
Directions: To get to the High Island, where you’ll get the best views of the rock formations, take the MTR to Diamond Hill Station, Exit C2. Hop on bus 94 from Sai Kung town center or 96R, which operates on Sundays and public holidays only. Alight after Pak Tam Chung and walk along Tai Mong Tsai Road to the junction. Make a turn to Man Yee Road on the right and take a 9-kilometer walk to the High Island.