Every farm you can visit on this coast exists because sugar left. The Kahuku Plantation Company milled cane at the eastern end from the 1890s until 1971. The Waialua Sugar Company held out at the western end until 1996, and its mill stack is still the tallest thing in Waialua. Between them they had shaped this entire coastline — the irrigation, the camp housing, the road network, the population — and when they shut, what remained was thousands of acres of flat, watered, sunny land with no crop and no employer.
What grew back is unusually varied for a strip of coast this small, and it is the reason agritourism here is better than the phrase suggests. On the Kahuku plain there are aquaculture ponds raising shrimp and prawns, and small diversified farms growing papaya, banana, apple banana, cacao and passion fruit — Kahuku Farms is the one that opened a café and a wagon tour and let visitors in. Behind Waialua, Dole's Waialua Estate grows coffee and runs a cacao orchard of around twenty acres, which makes this one of very few places in the United States where both are grown commercially on the same property. In the old Waialua mill building, Island X Hawaii sells the coffee and shows people the milling. Up at Wahiawā, on the drive between the H-2 and Haleʻiwa, Dole Plantation turned a 1950 fruit stand into an attraction that now draws over a million visitors a year, with a hedge maze, a two-mile narrated train and a plantation garden.
The ranches are a different business. Gunstock Ranch at Lāʻie is a working 400-acre cattle operation that sells trail rides, pony rides for very small children, ATV runs and a tree-planting programme in a legacy koa and sandalwood forest. Kualoa Ranch, forty minutes further down the windward coast at Kaʻaʻawa, is 4,000 acres, one of the largest cattle ranches on the island, and has spent thirty years renting its valley to film crews — over 200 productions have shot there, including the Jurassic films, which is why the valley is marketed under that name and why the UTV tour is the busiest thing on the east side.
Two honest notes before you book. First, geography: Kualoa and Dole are both commonly sold as North Shore experiences and neither is on the North Shore. Kualoa is on the windward coast, on the long route up; Dole is in central Oʻahu, on the short one. Both are worth doing. Neither is fifteen minutes from Sunset Beach. Second, booking: the Kualoa ATV tours routinely sell out days ahead, and turning up at the gate in high season does not work. Book that one before you leave home and fit the rest of the day around it.