930 to 5 but there's a 3rd part tour boat that takes 30 to 45 minute boat ride to it, and 930 is the 1st ride there but good to get there at least 15 minutes early to make sure you get on the boat and get tickets for it which is 24 dollars I think from when I went last week.
They have no official tours, but each boat has a volunteer that provides information.
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