Ko Nai Luang or Ko Phlap Phla is a small island in Khuean Kaeng Krachan Reservoir.  The island takes its name from the fact that it formerly housed a pavilion for King Bhumibol, once when he visited Kaeng Krachan.  In 1973, the King visited the area with Queen Sirikit and his royal family.  At that time, a bamboo pavilion was built for them.  The province then built a replica to replace the original version.  Historical photos of the royal visit are also displayed.  Flags and other decorations replicate the event’s atmosphere, when people welcomed the King, the Queen and the royal family.  Visitors will enjoy the refreshing breeze and relaxing atmosphere of the reservoir.  In addition, the area around Ko Nai Luang has been developed into a preservation and study area for fresh water fish, where no fishing is permitted.

Visitors can rent a boat to tour the reservoir.  Contact the restaurants around Kaeng Krachan Dam in the area of Ban Tha Rua.  The boat rental fee is 500-700 baht for 8 passengers.  The excursion takes 1-2 hours.  Visitors will enjoy visiting a sling bridge in the area of Kaeng Krachan’s National Park; as well as Ko Nai Luang Island, where a replica bamboo pavilion is situated.  Besides, the boat excursion will bring visitors to Ko Som and Ban Phu Khem Homestay communities.