Online and in the two cahiers on the place
If you buy tickets on line, do you have to print them or can you show on your phone?
online would be preferable as it avoids queue and allows easy check-in on the place but since online tickets are bought as per the timeslots available that day so if you are not sure of your time reaching the place then buy on-desk at the welcome counter of the facility...
Online is the best.
On site near main entrance, or online.
Two places to purchase the tickets. One's inside the main entrance and the other is through the Rats restaurant. I would generally prefer the rats one coz it's not familiar to general public and has less queues.
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