Ha Pak Nai is a subdivision of Pak Nai ( Ha means 'lower'). It is a coastal area in the…read morenorthwestern area of New Territories, and faces the Deep Bay. Partly a shallow pebbly beach and partly a wetland mangrove, it is listed as a Site of Special Scientific Interest in Hong Kong.
Besides driving (actually the parking space is kind of limited due to the rush of people at weekends days of good weather), you can also get there by taking minibus route no. 33 at Tai Fung Street at Yuen Long town center, not far from Yeun Long or Long Ping MTR station, and get off after Lau Fau Shan roundabout. Some friends also opted for biking there but it's not an easy route, so only for people with confidence with biking skills.
Because of its vantage location along the western coast, it is one of the best places in Hong Kong to view the sunset, unobstructed by buildings in front and overlooks onto the Shekou area of China on the far far horizon. The scene is quiet and open, and the sky stretches to infinity. It is even more serene if there is a bit of cloud in the sky, with the rays of golden lights refracted over the brim of the clouds forming layers of golden cotton candies . Quite a romantic view for couples indeed! On the pebbly beach you can often some fisherman's raising nurseries for seafood and also oysters raised on pieces of concrete blocks.
Additionally, it is also very close to Lau Fau Shan, a popular place from Chinese-style fresh seafood in HK for reasonable price, so it is a very common itinerary for the locals to go for the sunset view at Ha Pak Nai and then have a seafood feast over at there.