What: Hawaii Submarine Tour Where: Ohahu, Maui, Kona Who: Atlantis Submarines Description: Explore the ocean depths and learn about the Pacific's beautiful and exotic sea creatures on a U.S. Coast Guard approved submarine tour. See tropical fish, sharks, sea turtles, eels, shipwrecks and more up close. A unique and educational experience the whole family can enjoy. The subs are spacious and air conditioned, and go down to a maximum depth of about 125 ft.

What: Hawaii Military History Tour Where: Pearl Harbor and Other Sites Who: Home of the Brave Description: Honor the brave service of U.S. military members in Hawaii. This tour begins at historic Pearl Harbor. Other stops include: Wheeler Army Airfield, Schofield Army Barracks, Fort Shafter, Punchbowl National Memorial, Downtown Honolulu, Home of the Brave Museum and Gift Shop.

What: Hawaii Day Hike Where: Honolulu Who: Department of Land and Natural Resources Description: Put on your walking shoes, grab some water and head on over to the Department of Land and Natural Resources. Here you can find free hiking trail maps. Decide on what trails you'd like to see and spend the day exploring some of Hawaii's most beautiful places. Some popular destinations are: Manoa Falls Trail, Waikiki Historic Trail, Koko Crater, Makapuu Lighthouse, and Kaena Point.

What: Learn How to Surf Where: Ohahu Who: Hans Hedemann Surf School Description: Learn to Hang 10 on Hawaii's most scenic beaches. Discover the techniques of surfing in a safe environment from trained professionals. They offer private, semi-private, or group lessons. In a couple of hours, you'll be standing up on a surfboard and riding your first wave!

What: Volcano Hiking Excursion Where: Honolulu - Diamond Head Description: Diamond Head is a dormant volcanic crater that is very popular with tourists. Hiking up Diamond Head will take you about 45-60 minutes and will lead you along a changing and challenging terrain that ends in a long, steep set of stairs. Once you get to the top, the view is magnificent. Keep in mind that you must be in shape to attempt the full hike up. There are places to rest, but no facilities. The trail can be hot, so go very early in the morning--and bring water.
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? Donna Monday Cruise the beautiful Hawaiian Islands - even if you're on a budget http://www.last-minute-hawaii-cruise.com