What could be more exciting than swimming with sharks? Still thinking of an answer? There's probably not anything better. With North Shore Shark Adventures, the original Oahu shark tour company, you have a choice of two tours beginning at 7 a.m. and leaving from Haleiwa. You'll travel three miles out to sea and there's a good chance of green sea turtle, dolphin and whale sightings along the way. Jump onto either vessel, the Anela or Abunai, and head out into the ocean where you'll hop into the metal cage and enjoy time in the center of a swarm of sharks. Children as young as three are invited, and ages three to 13 cost $60 to actually get in the cage! Children under three can ride on the boat for free. Adults cost $120 but lower specials are sometimes offered. Military and kama`aina (residents) can dive for $50 while a military of kama`aina child is $35. Shark sizes range from five to 15 feet and each boat is 42-feet long. Tours last about two hours.