Pak Nai (Chinese: 白泥) is a wetland area, partly mud-bank, surrounded by mountain ranges, in the Yuen Long District facing Deep Bay. As the landscape works in great diversity. Pak Nai makes up the coastline as Sheung Pak Nai (上白泥) and Ha Pak Nai (下白泥) geographically.
It is known for sunset viewing and as one of the relic site dated back to couple thousands years ago. Pak Nai is famous for its ecosystem which comes with rich biodiversity, with rare species found offshore. And, intense public concerns were paid in recent years as a controversial development proposal sparked out, which eventually dropped out under huge objections.
Ha Pak Nai (“Ha” means “lower”) is best-known as being one of the best places for watching sunset in Hong Kong, making it a beloved place of so many photographers, tourists and dating couples. The best spots for the view of sunset are the shore along Ha Pak Nai and the junction of Deep Bay Road and Nim Wan Road. It is noticeable that Nim Wan Road is the nearest road to the sea in Hong Kong and also a popular 5 km cycling route for locals.
Ha Pak Nai's 6 km long shoreline is where mangroves, wetland and mud-bank are found. Therefore, rich biodiversity allows Pak Nai to become Site of Special Scientific Interest. Some species of crabs such as Perisesarma bidens and Ilyoplax tansuiensis are highlights of Ha Pak Nai. In addition, Ha Pak Nai used to be an oyster bed, thus, there is still remains of oyster shells all over the flat.
Apart from the natural scenic spots, couples of relics can be found in Pak Nai. The most remarkable one is the fortified structure at No.55 Ha Pak Nai, which is a declared monument due to its connection with revolutionary movement under the leadership of Dr. Sun Yat-sen.