Cape Raoul stands as the southernmost headland of the Tasman Peninsula, a 300-metre dolerite blade dropping into the Southern Ocean. The formation belongs to a rare geological typology: vertical columnar jointing, created 170 million years ago when magma cooled slowly beneath the earth's surface, contracting into hexagonal pillars. Erosion stripped away the sedimentary overlay, exposing the basalt organ pipes that now define Tasmania's most severe coastline. The headland was named in 1792 by French explorer Bruni d'Entrecasteaux for one of his officers, though the Tasmanian Aboriginal people knew the peninsula as a seasonal hunting ground long before European contact. Today Cape Raoul anchors Tasman National Park, a 107-square-kilometre reserve established in 1999 to protect the peninsula's coastal ecosystems and colonial ruins. The park absorbs the eastern flank of the peninsula, from Eaglehawk Neck to Cape Pillar, encompassing sea caves, blowholes, and Australia's highest sea cliffs. Port Arthur Historic Site occupies the peninsula's southern shore, its convict-built stone structures visible from offshore. Between 1830 and 1877 the penal settlement processed more than 12,000 convicts, and the ruins remain Australia's most intact colonial prison complex. The peninsula's isolation made it a natural detention zone: Eaglehawk Neck, a 30-metre-wide isthmus, was the only land route, guarded by soldiers and dogs. Cape raoul cruise from hobart operations navigate Constitution Dock to the Tasman Peninsula via Storm Bay and the Tasman Sea, a route that tracks the 1803 path of Lieutenant John Bowen's colonial fleet. Departure schedules cluster between dawn and mid-morning to exploit the glassy water that precedes the afternoon southwesterlies. Most vessels follow the eastern coastline, passing Betsey Island, Tasman Island Lighthouse, and the Candlestick sea stack before rounding Cape Raoul. The dolerite cliffs rise unbroken for five kilometres, their vertical grooves catching shadow and light in bands. Pelagic birds—albatross, shearwaters, gannets—spiral the updrafts. Australian fur seals haul out on rock platforms at the base of the columns, and pods of bottlenose dolphins track the offshore current. The peninsula's terrestrial access requires a five-hour return hike from Stormlea Road, a track that crosses buttongrass moorland and descends through coastal heathland before emerging at the clifftop lookout. The marine approach collapses that distance into a two-hour passage, delivering visitors to the cliff base where the dolerite meets the sea. Hobart to cape raoul boat tour offerings typically bundle the coastal passage with Port Arthur entry or Tasman Arch stops, creating a half-day or full-day itinerary that balances geological spectacle with convict history. The cruises operate year-round, though winter months see reduced frequency due to ocean swell and visibility.