There couldn't be a better place for finding free things to see and do than in Hawaii, and Oahu sure does deliver. One of the great things about traveling to Oahu is that once there, visitors can spend the majority of there time doing things for free, that is if they like the outdoors. Because it shouldn't come as a surprise that the best things in life are free, and outside. Hiking, beaches, snorkeling and surf viewing are some of the best things to do and they're all free.
Beaches may be the biggest lure to Oahu and it has an abundance of amazing ones. Sunset Beach on Oahu's North Shore and nearby Waimea Bay are two of the best beaches on the island. They both offer fine white sand, beautiful sunsets, and in the winter, front row seats to some of the world's best surf.
Also on the North Shore is a fun hike that climbs quite steep and then traces the inland cliff east, ending at a WWI bunker ideal for sitting an taking in the panoramic view. The Ehukai Bunker Hike is about 1.5 miles round trip and small children can do it too. A much easier hike is Manoa Falls. This is more of a walk through the forest, ending at the falls.
Snorkeling Hanauma Bay will be by far the best snorkeling experience on the island. Since the reef is a marine preserve, no fishing is permitted and the underwater life is thriving with colorful tropical fish.