I think this is the best dive site on the north shore! Like all north shore dives, only good in the summer or way-calm days other seasons. This site has a great description of the driving directions and parking in the Park lot south of the Fire House. Entry is just a little tricky over the lava rocks. There is a distinct trail that goes from the north end of the parking lot, hugging the Fire House fence around the Banzai trees. You then drop down into a sandy area and can enter through a protected cove about 50 yards from the edge of the rocks . . . the cove opens to the south. You can also walk out to the edge of the lava rock and giant-stride in, but can't get out there. Exit though the small cove is a little bumpy if there is any swell but not too bad. Would be impossible with anything above 3-4 foot swells. Others have described the 'Cathedral' cave, so I will only say it is way cool! You can spend the entire dive exploring under it if you want. We also went out from there on about 270, weaving around through the collapsed lava tubes out to a wall that drops to about 45 feet. Lots of large reef fish, a turtle cleaning station, free-swimming morays, and octopus hiding in holes on the bottom. Will be back there many times to explore!