Out on Kauai's far North Shore, beyond Hanalei and the last wooden bridge, there's a mighty cleft in the coastal range where ancestral Hawaiians lived in what can only be called paradise. Carved by a waterfall stream known as Limahuli, the lush valley sits at the foot of steepled cliffs that Hollywood portrayed as Bali Ha'i in the film classic South Pacific. This small, almost secret garden is ecotourism at its best. It appeals not just to green thumbs but to all who love Hawaii's great outdoors. Here botanists hope to save Kauai's endangered native plants. You can take the self-tour to view the plants, which are identified in Hawaiian and English. From taro to sugar cane, the mostly Polynesian imports tell the story of the people who cultivated the plants for food, medicine, clothing, shelter, and decoration. In addition, Limahuli's stream is sanctuary to the last five species of Hawaiian freshwater fish.