Mermaid Cave is a hidden underwater cave on the west side of Oahu. Cross some jagged lava rocks and descend down an open hole to find this cave. Go during the early day when it’s low tide. 📍Address: Nānākuli Beach Park Chunkadelic ($9.00) Riss Moore ($9.00) #hawaii #oahu #honolulu #waikiki #hawaiian #thingstodoinhawaii #hawaiitiktok #hawaiifoodie #hawaiianfood #hawaiifood