Category Coasteering
Hexagonal columns, archways, tunnels, corals, clean water, a white sand beach. Near perfect coasteering destination but for the logistics and swim distance.
Small island in the way to Saikung that requires swimming or kayaking there. Nice rock formations with varied terrain, including high cliffs and flat coral areas.
The Eastern shoreline of Cheung Chau is by far the most technical. Similar rock formations to the rest of the island with the added difficulty “fun” bonus.
Coasteering from Shek Pik reservoir to Shui Ha Wan mud flat is a long interesting route. Suitable for beginners trying to challenge themselves.
A small island just in front of one of the busiest beaches in Hong Kong, Shek O, perfect for coasteering. Several caves, cliff jumping spots all around.
Although I haven’t been there myself, Tyler, Colin, and others have been. Therefore adding information for your reference (several readers asking).
Surprisingly interesting rock formations and fun scrambling on the Westernmost coast of the island. Everything fine but for the turbid water.
Repulse Bay to Chung Hom Kok is coasteering introductory classic. If you are ready to swim long there is a more impressive route around.
East peninsula of Lamma coasteering. Relatively complex fun scrambling, a lighthouse, the Dinosaur Egg rock, a small arch to swim through.