Teleport to Donator Island is located in the Temple.

To gain access to the island you must use
Donator Island Access item shown above
(You can obtain it from giveaways or Premium Shop) 

There are several interesting places on the map, for example:

We would like to remind you that on Donator Island you can take a free reward every day:
&

 All hunting grounds have level gates 100 levels lower than those with VIP Access. Remember!
If you have Donator Access, another player with access can also enter your hunting ground!