Sydney to Singapore

Set on what Captain Arthur Phillip called "the finest harbour in the world," Sydney stakes its claim on the global imagination with Jørn Utzon's sail-roofed Opera House, a bridge you can climb for panoramic views, and a food scene anchored by Sydney rock oysters and the largest fish market in the Southern Hemisphere. The Blue Mountains and Hunter Valley wine country extend the adventure beyond the city. October through April brings summer warmth and the harbour at its most luminously blue.

Airlie Beach is the tropical gateway to the Whitsunday Islands and the Great Barrier Reef, where seventy-four islands float in turquoise Coral Sea waters above one of earth's greatest marine ecosystems. Must-do experiences include Whitehaven Beach's pure silica sands, snorkelling the outer reef with reef sharks and giant clams, and the Hill Inlet aerial view. April through November's dry season offers the best visibility and calmest seas.

Townsville is North Queensland's gateway to the central Great Barrier Reef, where Magnetic Island's wild koalas and granite beaches lie twenty minutes by ferry and the legendary SS Yongala shipwreck offers one of the world's top ten dives. Visit June through October via Cunard or Holland America Line for pristine reef sections, the world's largest living coral reef aquarium, and the quieter alternative to Cairns that delivers equal natural wonder with fewer crowds.

Darwin is Australia's tropical Top End capital, where sixty-five thousand years of Indigenous heritage meets extraordinary multiculturalism, saltwater crocodiles, and gateway access to Kakadu's ancient rock art. Must-do experiences include the Mindil Beach Sunset Market, swimming beneath Litchfield's waterfalls, and viewing twenty-thousand-year-old Aboriginal paintings at Ubirr. May through October's Dry season offers clear skies and outdoor market culture.

Bali, Indonesia's Island of the Gods, is a cultural and natural wonderland where ancient Hindu temples, emerald rice terraces, and vibrant artistic traditions converge around the cruise port of Benoa. Must-dos include Ubud's Tegallalang terraces, the cliff-top Uluwatu sunset kecak dance, and feasting on babi guling suckling pig. The dry season from April through October offers the most comfortable conditions.

Surabaya, Indonesia, immerses visitors in Southeast Asia's intoxicating blend of ancient culture, extraordinary cuisine, and tropical beauty. Don't miss the vibrant local markets and street food scene, where regional flavors achieve remarkable complexity. The most comfortable visiting conditions occur year-round, though the drier months from May to October tend to offer the most comfortable conditions. Cruise lines including Oceania Cruises feature this port on their most compelling itineraries. Whether you have a few hours or a full day, the port rewards exploration at every pace and in every direction.

Semarang is Central Java's port capital, gateway to the world's largest Buddhist monument at Borobudur and the soaring Hindu temples of Prambanan, with its own reward of a Dutch colonial Old Town and Indonesia's most distinctive street food. Must-dos include sunrise at Borobudur, the Prambanan temple compound, and tasting Semarang's famous lumpia spring rolls. Visit June through August for clear skies and comfortable temple-visiting weather.

From Raffles's 1819 trading post to the world's second-busiest port, Singapore has always been where the world's trade routes converge — and its Supertree Groves, UNESCO-listed hawker culture, and the bowl of Hainanese chicken rice at Maxwell Food Centre confirm that its ambition has never dimmed. As Southeast Asia's definitive cruise hub, it serves as the ideal starting point for voyages across the Indian Ocean, the Indonesian archipelago, and beyond. February through April offers the most settled weather for exploring this extraordinary island city-state.