Campbell Island / Motu Ihupuku is an uninhabited subantarctic island of New Zealand, and the main island of the Campbell Island group. It covers of the group's , and is surrounded by numerous stacks, rocks and islets like Dent Island, Folly Island (or Folly Islands), Isle de Jeanette-Marie, and Jacquemart Island, the latter being the southernmost extremity of New Zealand. The island is mountainous, rising to over in the south. A long fiord, Perseverance Harbour, nearly bisects it, opening out to sea on the east coast. The island is listed with the New Zealand Outlying Islands. The island is an immediate part of New Zealand, but not part of any region or district, but instead Area Outside Territorial Authority, like all other outlying islands, other than the Solander Islands. It is the closest piece of land to the antipodal point of the United Kingdom, and Ireland, meaning that the furthest away city is Limerick, Ireland. Campbell Island is a UNESCO World Heritage Site. Campbell Island was discovered in 1810 by Captain Frederick Hasselborough of the sealing brig Perseverance, which was owned by shipowner Robert Campbell's Sydney-based company Campbell & Co. (whence the island's name). Captain Hasselborough drowned on 4 November 1810 in Perseverance Harbour on the south of the island, along with a young woman and a boy. The island became a seal hunting base, and the seal population was almost totally eradicated. The first sealing boom was over by the mid-1810s. The second was a brief revival in the 1820s. The sealing era lasted from 1810 till 1912 during which time 49 vessels are recorded visiting for sealing purposes, one of which was lost off the coast. The whaling boom extended here in the 1830s and '40s. In 1874, the island was visited by a French scientific expedition intending to view the transit of Venus. Much of the island's topography is named after aspects of, or people connected with, the expedition. In December 1840 Campbell Island was the last landfall before the Ross expedition explored the Antarctic.