Oahu is encircled like a lei with more scenic miles of sandy beaches than any of the Hawaiian Islands. The island also abounds with water sports, many of which support ecotourism and are inexpensive or free. Yet most tourists spend their entire vacations at Waikiki. And they never know what they are missing.

Some of the best beaches in Hawaii and the United States are found on Oahu. You may have seen some of them on the Travel Channel. At least two of them, Lanikai and Kailua Bay, have earned number one position on Dr. Beach's list.

Even on a tight budget, you can kayak, snorkel, swim, body board, take a surf lesson, go on a sailing dolphin swim cruise, paddle on a body board to a deserted off shore island, and still have money left for other eco activities. Amazing sunsets on the North Shore and the Leeward side are free of charge, as are front row seats to world class surfing championships.

And with shore waters surrounding the island no colder than most indoors swimming pools, there