The island of Rarotonga is the most populous island of the Cook Islands, with a population of 14,153 (census 2006) and stands over 14,750 feet (4,500 meters) above the ocean floor. The island is 20 miles (32 km) in circumference and has an area of 26 square miles (67.19 km²). At a depth of 13,000 ft (4,000 m), the volcano is nearly 31 miles (50 km) in diameter. Te Manga, at 2,140 ft (658 m) above sea level, is the highest peak on the island. The interior of the island is dominated by eroded volcanic peaks cloaked in dense vegetation.