Parkour Arena​

Parkour is a fun, challenging, and competitive thing in Minecraft. In our server there are some parkour arenas throughout various towns. I have seen some of these arenas for myself and while they are fun i feel that the parkour experiences should be even better. So I ask you, the community what are your ideas on the biggest and best parkour arena. What do you look for in one? How much do you think entrance should be? Would it be something you would do in your spare time? Constructive criticism is something I'm looking for on this page but please keep the forum rules in mind. Also please choose an answer on the polls to help me compile data easier.Thank you for your time.