Are you required to purchase a time slot ticket, or can show up and go anytime?

I strongly purchase the tickets online before you go. it will be cheaper and you don't have to wait to purchase ticket

You can go anytime but since it gets crowded, and they also have events there, they put a time slot there!

Any time, early the better

You can go anytime. But the tickets are more expensive

Any time. Itsa must see