Kwun Mun Monument Cave 《II》

This is a natural cave formed by wave erosion called a 《Sea Cave》, which is a common coastal erosional landform in the Sai Kung area. Before the completion of High Island Reservoir, the sea cave faced the open sea, continuously expanding and deepening through long-term marine erosion. After the reservoir was completed in 1978, the breakwater effectively blocked the crashing waves from the coast. As a result, the sea cave stopped eroding and its evolution slowed down, leaving it preserved in almost the exact same form as it was back then.