Oahu, the third largest of the Hawaiian Islands, is a hub of cultural diversity, adventure, and natural beauty. According to locals who treasure their idyllic island surroundings, here are 20 of the best things to do on Oahu that offer a true glimpse into the heart of this Pacific paradise:

1. Surf the legendary waves at North Shore, particularly in the winter when swells attract surfers from around the world.

2. Snorkel amid a kaleidoscope of marine life at Hanauma Bay Nature Preserve, where conservation efforts make for pristine waters and thriving aquatic fauna.

3. Hike up to the iconic Diamond Head State Monument for panoramic views of Honolulu and the Pacific Ocean.

4. Experience the history at Pearl Harbor, including visits to the USS Arizona Memorial and the Battleship Missouri Memorial.

5. Stroll through Honolulu’s bustling Chinatown for unique eats, markets, and a blend of cultural heritage.

6. Chill out at Lanikai Beach, often rated as one of the world’s best beaches for its soft white sands and calm turquoise waters.

7. Discover traditional Hawaiian culture at the Polynesian Cultural Center with its interactive exhibits and authentic village recreations.

8. Take a drive along the scenic Windward Coast to witness lush landscapes and rugged coastlines unmatched in their beauty.

9. Immerse yourself in Hawaii’s royal history at Iolani Palace, the United States’ only royal palace.

10. Trek through the verdant Manoa Valley to find the hidden waterfall situated deep in its rainforest.

11. Paddle out on a kayak or stand-up paddleboard to Mokulua Islands from Kailua Beach Park for an adventurous day trip on crystal clear waters.

12. Watch an unforgettable sunset from Waikiki Beach then explore its energetic nightlife scene.

13. Explore Byodo-In Temple in Valley of Temples Memorial Park, a tranquil replica of an ancient Japanese temple set against a striking mountain backdrop.

14. Enjoy farm-to-table cuisine and locally grown coffee at a café in upcountry regions like Waialua and Wahiawa.

15. Marvel at marine wildlife including sharks, turtles, and dolphins with eco-friendly tours along Oahu’s coasts or within designated preserves.

16. Experience the breathtaking view from Pali Lookout where King Kamehameha won a pivotal battle that united Hawaii’s islands.

17. Check out local art scenes at First Friday events in downtown Honolulu or visit art galleries sprinkled across Kaimuki neighborhood.

18. Seek out some of Oahu’s amazing street murals that showcase contemporary creativity within historic communities like Kaka’ako.

19. Learn to prepare traditional Hawaiian dishes in culinary classes that specialize in local cuisine – use poi instead of potatoes for an island twist!

20. Partake in a traditional Hawaiian luau complete with hula dancing, fire knife performances, and delectable Pacific Island dishes for an evening not soon forgotten.

Exploring Oahu according to these local insights offers a diverse array of experiences that range from adventurous outdoor pursuits to deep cultural discovery – ensuring memories as colorful as Hawaiian sunsets themselves.