With more than 600 islands, 850 indigenous languages and 13,500 plant species, Papua New Guinea seriously impresses when it comes to diversity — both botanical and cultural. The untouched wilds of volcanic caldera and dense rainforest are best navigated by ship, allowing you to hop between highlights without leaving a trace. Cruise on Swan Hellenic’s small vessel from Honiara (Solomon Islands) to Jayapura (Indonesia) over 13 nights from 5 April 2026 on an itinerary that includes snorkelling in kaleidoscopic reefs, Zodiac adventures and tribal encounters. Plus, Second World War history: among the stops is Kennedy Island, where JFK was briefly marooned in 1943. The 13-night Wild Eden of Papua New Guinea cruise starts from £8,296 per person.