KC Kwang & Sons (or Twin Diamond Plantation) is a grape and tomato farm in Kampung Raja, nestled on 60 hectares of land. Open to public, the vineyards cultivate the 'Kyoho' variety of grapes, which are sweet, succulent and large. The grapes are harvested only twice a year in June and December, but visitors may see the grapes up close without touching or damaging them.
During harvest time, the grapes are sold at the farm with the bulk going to export. Besides grapes, the farm also cultivates tomatoes along with hydroponic vegetables that can be purchased. Visitors can also explore the farm's factory and witness the big production line of grapes and other crops being packed.