National parks are places that are protected in perpetuity for their outstanding natural and cultural heritage. Yet beyond tourism they also play other important roles in the country’s economy. Major rivers such as the Clutha have their source in Mount Aspiring National Park. The park’s mountains and valleys work as rain catchers and downstream, outside the park boundary, these waterways are utilized for hydroelectric power and irrigation for agriculture. Parks also are havens for biodiversity that can provide resilience to impacts arising from intensive agriculture.