This is Guandao Cave, the tallest sea arch in Hong Kong at 45 meters. Located on Basalt Island in Sai Kung, it features striking hexagonal volcanic rock columns, photogenic locations, and plenty of explorable spots, both under and above water and is part of the Hong Kong UNESCO Global Geopark. Accessible by speedboat, it offers breathtaking views and unique exploration opportunities. Sai Kung Public Pier has many speedboat options, or you can hire a private boat for an agreed-upon pick-up and drop-off time. It takes about 30 minutes to travel to Basalt Island by boat. You can request to be dropped off at the pebble beach on the northern side, closest to Sai Kung. Boats are also able to drop you off directly in front of the Sea Palace or Lam Wan Kok Cave, the famous archway of Basalt Island. #Island #islandhopping #adventuretravel #hongkong #explorehongkong