Kaimu’s black sand beach feels otherworldly – jet-black from recent lava meeting the ocean – and this short hike takes you to a hidden tide pool that looks like a natural aquarium. You’ll walk through jungle trails and boulder fields to reach crystal-clear water teeming with unique snails (opihi), brittle stars, spaghetti worms, pink coralline algae and seaweed clinging to cool rocks. Sea turtles often swim in the distance, adding to the magic. The rocky pool is perfect for a refreshing dip when conditions allow (almost always accessible for submerging), though it’s not for everyone – no ticks or mosquitoes, but the terrain isn’t ideal for disabilities or kids under 5. A peaceful, intimate spot that feels far from the crowds, with that raw Big Island beauty.
