Shark’s Cove is one of the best snorkeling spots on Oahu. There’s a huge area that is protected from waves by high reef walls, fun underwater cave networks to dive and swim through, and you’ll almost always find tons of fish and turtles.
Pu’u Manamana is an absolutely incredible hike that’s not for the faint of heart. At times you will be standing on the top of a ridge that is a foot wide with steep, hundreds-of-feet drop-offs on both sides. You need a clear day with no winds for this one!