Te Ahuahu - a beautiful volcanic cone located to the west of Lake Ōmāpere in New Zealand. Standing at a height of 373 meters, this andestic basaltic scoria cone has a rich history. It was the site of the Battle of Te Ahuahu during the Flagstaff War of 1845-46, where a Maori raiding party led by Tāmati Wāka Nene captured the pā after Hone Heke left it to gather food.
 
The Department of Conservation successfully undertook an eradication program to remove pests such as kiore, ship rats, and cats from the island. In 2016, the island was declared pest-free, making the entire Mercury Island Group free from introduced mammalian pests. Today, Te Ahuahu remains open to the public to showcase conservation and provide an accessible pest-free island in the Mercury Island Group.