Yes you can
Yes, tickets can be purchased at the entrance
Or buy VIP tickets online.. no waiting at all.
You can buy the New York pass, which in addition to the bus includes the ticket, that and others, in the center they offer you 3 4 5 or more days
Yes,but you need to make a long line,so I surger you to buy it before online or,if you want visit many monuments and museums, check on the net the "new york city pass",you'll save many Money and you'll can visit 6 of the best building and museums of NYC
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