This is a theme puzzle with the subject stated below. Find the listed words in the grid and when you have completed the puzzle, there will be letters left over. They spell out the alternative theme of the puzzle.
On Norfolk Island
Bays Beach Bicycle Birdlife Bligh Boat Charm Convicts Danger Diving Explore Fletcher Fun Georgian Glade Haven Hike Hills Ideal Liqueurs Love
Solution: 29 letters
Bates Museum Ocean Origins Pacific Penal
settlement Pines Quiet Rock Sleepy Swim Tax-free Tiny Wataweih