Kayaking along Pictured Rocks National Lakeshore, Upper Peninsula, Michigan. I did this for vacation last year. It's an eight hour day trip along the Pictured Rocks. Breath taking and well worth the money you spend on the experience!
Coron Bay, Busuanga Island, Philippines - The final resting place for nine sunken ships from World War II. Also found in waters surrounding the island are limestone walls which rise to heights of 22 meters offering a spectacular view.