What is it?

Heard Island and McDonald Islands are the most remote place on Earth flying the Australian flag — a pair of raw, ice-clad volcanic outposts adrift in the Southern Ocean, roughly two-thirds of the way from Madagascar to Antarctica. Heard Island is dominated by Big Ben, a 2,745-metre active stratovolcano crowned by Mawson Peak, whose glaciers grind down to black beaches while lava sometimes glows through the snowpack. There are no airstrips, no harbours, no buildings, no permanent human presence — nothing but the roar of the Furious Fifties, the crash of surf, the reek of king penguin guano, and the bellowing of elephant seals hauled out in their thousands. Because no invasive species have ever taken hold, this UNESCO World Heritage site is one of the only genuinely pristine subantarctic ecosystems left, a living laboratory where glaciers advance and retreat and new land is still being born. Discovered in the 1850s and briefly exploited by sealers, the islands later hosted an Australian research station at Atlas Cove from 1947 to 1955; today they are visited by a handful of scientists, sailors and radio expeditioners in an average year — sometimes none at all.

Where is it?

The islands lie in the southern Indian Ocean, about 4,100 km southwest of Perth and 1,700 km north of Antarctica, administered as an Australian external territory. Access is by ocean-going vessel only — expedition yachts and icebreakers typically depart from Fremantle or Albany in Western Australia, Cape Town, or make the crossing from Kerguelen or Mauritius, with 8–14 days of open-ocean sailing each way. The narrow weather window is the austral summer, roughly November to March, when pack ice retreats and landing swells at Atlas Cove or Spit Bay occasionally drop enough to allow a Zodiac ashore.

What makes it worth it?

Very few people alive have stood on Heard Island — fewer than have summited Everest by orders of magnitude — and those who have describe it as the closest thing on Earth to landing on another planet. Standing on a beach where king penguins walk up to inspect you because they have no learned fear of humans, with a glacier calving behind you and steam drifting from an active volcano above, rearranges your sense of what wilderness means. Sailors who make the crossing talk about the humbling scale of the Southern Ocean, the days of grey water and albatross, and then the electric moment Big Ben finally appears out of the mist. "There is no sound of humanity here at all," one expedition member wrote — "just wind, ice and animals, exactly as it has always been." Years later it isn't the summit or the statistics you remember, but the smell of the rookeries, the seals asleep in the tussock, and the knowledge that you touched one of the last truly untouched places on the planet.

How accessible is it?

This is arguably the hardest bucket-list destination on Earth to reach: there is no tourism industry, no scheduled transport, and landings require a permit from the Australian Antarctic Division under the Environment Protection and Biodiversity Conservation Act, granted almost exclusively for science, conservation or heritage purposes. Applications must demonstrate environmental management plans, biosecurity procedures (boot scrubbing, quarantined gear, no fresh food ashore), and self-sufficiency in medical and rescue terms — help is days away, and the nearest hospital is a week's sailing. Realistically, participation comes via joining a scientific programme, a chartered expedition yacht, or one of the legendary amateur-radio DXpeditions (the VK0 activations) that recruit and fundraise years in advance; berths on such trips have run from roughly US$25,000 to US$100,000+ per person. Expect 4–8 weeks away, sustained heavy weather in the Roaring Forties and Furious Fifties, cold-water survival training, strong sea legs and full polar clothing. Occasionally a handful of luxury expedition cruises include a distant sail-past without landing — a far easier, though far less intimate, way to see Big Ben. Search for "Australian Antarctic Division HIMI permit" and "Heard Island expedition" to begin the long planning process.