Yes, about an hour, go get city pass it is much cheaper and many places to visit.
The one that comes with the CityPass is one hour long.
Plan for one hour and thirty minutes in terms of timing. It's better to book in advance.
I believe there are three different trips one can take, the harbor cruise is about an hour, the others longer but check their website for full details.
There are both 1 hour and 2 hour cruises
It's 1 hour..
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