It is recommended. Buy tickets online.
I would. Especially if you want to go on the guided tour. (Highly recommended!)
If you want visit it but also other monuments of NYC is better that you buy ,online, the new york city pass (Empire,Statue of liberty + Ellis Island,Top of the rock,Met, National Natural and science Museum,9/11 Museum). With it you save many Money and you can step up the biggest part of the lines...
You can purchase tickets there but you may wait in a long line. Purchasing them online was much faster for us.
Nope, you get them at a kiosk at the site
You can buy it in the place.
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