Photo of Waimea slide-shaped canyon
Helicopter view of Napali coast

Kaua'i west coast is not as touristically famous as the northern coast but it is the less accessible which probably explains everything.
Nevertheless, from helicopter, the landscape is abolutely fabulous, it is a succession of canyons and steep cliffs (Waimea national park).
Further north is the Napali coast, real natural jewel only accessible by helicopter, boat or via the 11 miles long Kalalau trail.