Kauaʻi

What you gain

• ↑Na Pali Coast is the most scenically dramatic coastline accessible in the US — boat tours along the 17-mile stretch of fluted green sea cliffs are available from Hanalei or Port Allen and include sea cave entries, spinner dolphin pods, and monk seal sightings; the Kalalau Trail (11 miles one-way) is one of America's finest hikes
• ↑Waimea Canyon State Park offers canyon scenery entirely unlike the rest of Hawaii — a 16km-long canyon reaching 1,097m depth with reddish volcanic rock layers, lookout points, and hiking trails that feel more like Utah than the Pacific
• ↑The north shore (Hanalei, Princeville) is the most beautiful and least commercially developed corner of any Hawaiian island: Hanalei Bay's crescent beach, the pier fishing scene, and the taro-field valley backed by fluted peaks are everything the Hawaii postcard suggests without the Waikiki crowds

What you sacrifice

• ↓Kauai's north shore receives the most rainfall in the Hawaiian islands — the Hanalei area can see sustained cloudy and rainy spells lasting days, particularly in winter; the south and west coasts (Poipu, Waimea) are dramatically drier, but visitors based in Hanalei should expect rain as part of the experience
• ↓Kauai has no direct flights from most mainland US cities and requires a connection through Honolulu or Maui — this adds time and cost to any itinerary, making Kauai typically a second or third island added to a longer Hawaiian trip rather than a solo destination