First we walked down the road at East Dam, to have a look at the hexagonal columns. We checked out the fault breccia (a place where the rocks have been crushed due to crust movements), and the bent columns further down. These bends again have been caused by movements in the earth, this time before the columns had cooled down enough to become solid. Later, after cooling, a large crack appeared in the rock, which allowed lava to intrude and form a dyke.
The next stop was a sea cave, cut off from the sea by the coffer dam now. The columns are tilting here, the cave itself is tilted as well, following the structure of the columns. Such sea caves form where there is a weakness in the rock, which is slowly eroded by the continuing wave action.
From the cave it was another scramble over the rocks and then up the coffer dam to get back on the trail, and on we hiked to Po Pin Chau, a huge sea stack. This island used to be connected to the mainland, but waves cut though the land – first a sea cave formed, which grew deeper and deeper until the waves broke through forming a sea arch, which grew so wide that in the end the roof collapsed leaving behind this sea stack.
On the way is a resting point, here frequent hikers have set up a few makeshift benches and suspended this swing from a large tree branch. A welcome break after the demanding walk.
Mok Min Cave was close by now. Last time I tried to approach this via the south-east side, this time I choose the north-west side of the headland. It was an easy scramble over the rocks, and soon after I found myself standing inside the sea arch. That is really impressive. This is the landward side, so the waves are small, the main wave action is from the other side, facing the open ocean. That is also the reason that this side does not have so steep cliffs: erosion is far less.
After that we walked on to Pak Lap village where we sat down for a quick drink. To promote recycling, the cafe has bins to separate waste, and to be able to collect more cans they built this can crusher. Of course my son just had to try it out. And do it again. And again. Destroying stuff is just so much fun!
Refreshed, we continued on the last part of this walk, to the restaurant at Sha Kiu for a nice lunch. It was a bit late already, and probably owing to the cool weather and the marathon that was held the same day the restaurant was as good as empty.
After enjoying our lunch we got a speed boat to take us back to Sai Kung. No visits to the sea arches this time, we left that for another trip.