Climb up the Diamond Head Trail to get an amazing and stunning view of the city and the Pacific. This is a 0.8-mile round trip hike that is steep and strenuous, but definitely worth the effort. Bring water and sunscreen as it can get hot and exposed along the trail. Be sure to arrive early while the park opens at 6:00 AM as it can get crowded throughout the day.
Kualoa Ranch & Private Nature Reserve is a 4,000-acre working cattle ranch, and a popular film location for movies and TV shows. Take a thrilling ATV tour through the Jurassic Valley and visit film sites where famous movies like Jurassic Park, Godzilla, and Kong: Skull Island were filmed. Other activities include ziplining, horseback riding, and exploring the beautiful beaches and valley on the ranch.
Get up close and personal with one of the world's most notorious predators on the North Shore Shark Adventures. Experience the thrill and excitement of watching sharks feed within a cage, while learning all about their biology and behavior from the educated guides. This is an incredible once-in-a-lifetime opportunity that is both educational and adrenaline-pumping.
If you have more time in Oahu, consider visiting the Manoa Falls or Hanauma Bay Nature Reserve for some more hiking and beach activities. If you have less time, cut down on one of the activities or combine Diamond Head State Monument and Kualoa Ranch on the same day. Remember to carry water, sunscreen, and comfortable clothes and shoes for a day full of adventure.