Are yams and sweet potatoes the same?
largest island in the southern group of the Cook Islands, in the South Pacific Ocean, about 2,100 miles (3,400 km) northeast of New Zealand. Volcanic in origin, it has a rugged interior rising to 2,139 feet (652 metres) at Te Manga. Surrounding its mountainous core is a plain, an ancient raised fringing coral reef covered with sediment. The island itself is fringed by a coral reef.