The Rock Cruises Get on the The Rock NZ boat for the most action-packed Bay of Islands cruise in New Zealand. Come aboard and let the activities begin! an image Activities in the Bay of Islands don't get better than with the Rock Cruises. Our action-packed choice of 2 different adventure-filled Bay of Islands cruises are full of fun activities starting from only $138 per person! That includes fishing, kayaking, snorkelling, hiking, target shooting and star gazing. Of course, you can simply relax, drink in the stunning New Zealand scenery and enjoy the wide variety of wildlife that inhabits this unique region of Northland.