Hurray!  The geological wonder at the East Dam of High Island Reservoir cannot be more breathtaking.  In fact, the world-class hexagonal rock columns have always inspired awe and respect.  Each of them was formed more than 140 million years ago. As mixtures of lava, rock debris, volcanic ashes contracted during the cooling period after the frequent volcanic activities.  The hexagonal rock columns at the East Dam even appear in an S-pattern, because the columns were still contracting while a tectonic shift was taking place.  You can reproduce the world-renowned masterpiece.  The Scream as you take pictures in front of the twisted columns.  Other highlights in the surroundings of the East Dam include the sea stack on Po Pin Chau, some sea caves, massive dolosse, and the dam, which are all photography hot spots.