Lihue is the main city of Kauai. I’ve been to Hawaii three times, and Kauai is my favorite by far. The south shore is cute, but get yourself to the North Shore and spend as much time as possible admiring the Napali coast. We took a helicopter tour, a boat tour, AND hiked the Napali trail. It still wasn’t enough. Absolutely amazing. (And we have amazing mountains in Colorado. The Napali coast is better.)
* This is an airline sale that is time-sensitive. Plenty of alternate dates (even in other months), but you’ll need to book this fare before the sale ends.