A wooden line reaches out over the sea, so far it seems to be trying to touch the horizon. The Busselton Jetty, the longest wooden-piled structure in the Southern Hemisphere, stretches 1,841 metres across the calm waters of Geographe Bay in southwestern Australia. Ships anchor offshore, and tenders drop passengers at the foot of this structure, begun in 1853 and extended over more than a century as the timber trade grew. The stop announces itself right away: turquoise sea, golden beaches, and, further inland, the renowned Margaret River vineyards.

The Jetty, a Walk Out to Sea

Walking to the end of the structure takes a good half hour, lulled by the lapping water and the cries of terns. A small solar-powered train also runs along the jetty for those who'd rather save their legs. At the far end, an underwater observatory descends eight metres below the surface: through its windows, soft corals, schools of fish, and pilings covered in colourful sponges form a life-sized aquarium, fed by a warm current that gives the bay marine life surprisingly rich for this latitude. Tours run in small groups at set times; it's best to check in on arrival to reserve a spot. Snorkellers, meanwhile, are free to explore the pilings, which have become, over the decades, a thriving artificial reef.

The Waterfront and the Town

Back on dry land, the foreshore area brings together lawns, playgrounds, cafés, and a museum devoted to the jetty's history. The main street, Queen Street, extends the walk with its shops and relaxed terraces. Everything is within walking distance, hat and sunscreen in hand; the beach borders the town centre for kilometres, and the shallow water here stays remarkably calm, sheltered by Cape Naturaliste.

Margaret River, the Vineyard by the Indian Ocean

The stop's most popular excursion heads south, through eucalyptus groves and pastures, to the Margaret River wine region. In about forty minutes, beaches give way to rows of vines. The wineries — some pioneering estates planted in the 1960s — have built a global reputation on cabernet sauvignon and chardonnay. Tours combine tastings, fine dining, and sometimes artisan cheese or chocolate makers; non-drinkers won't be bored either, with breweries and galleries dotting the same country roads. The scenery alone, between karri forests and ocean, is worth the trip.

Caves and Wild Capes

The peninsula stretching between Cape Naturaliste and Cape Leeuwin hides a string of limestone caves adorned with formations, including Ngilgi Cave near Yallingup, open for guided tours. At Cape Naturaliste, a stone lighthouse watches over coastal trails where, depending on the season, you might spot the spouts of migrating humpback whales. These outings pair well with a morning at the jetty for a well-balanced day between sea and land.

Planning Your Day

• Jetty walk, train, and underwater observatory: right on site, a full half-day;
• beaches and downtown: within walking distance of the landing point;
• Margaret River vineyards: about a 45-minute drive, by excursion;
• Ngilgi Cave and Cape Naturaliste: 30 to 40 minutes by road.

Back Across the Bay

At boarding time, the jetty stretches out in the low evening light, and evening anglers take over from the day's strollers. The tender glides toward the ship, sky and sea blending into one. Busselton leaves behind a rare mix: the simplicity of a family-friendly seaside town and the elegance of a great wine region. A day measured out in wooden planks, raised glasses, and horizons — one that always seems to end a little too soon.