The Atlantis cruises, located out of Honolulu, was definitely an adventure. A little scary at first (think slight claustrophibic in a tiny sub), the sights definitely make up for any fears i had of our running out of air. You first take a boat out to the sub, and just seeing it emerge, and how you get into it, and then down is worth the trip alone. But the fish and plantlife you see is even better. If you haven't been on a sub before, this is a great trip. Only downfall - the shipwrecks you're viewing aren't real - they are planted to show you the cool fish surrounding it.
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