Hats Land is an area in Ice Cream Simulator that currently has 6 areas filled with tier hats since Update 9 (11/15/2018). If you look correctly, there are about 4 more spaces to be filled with new kinds of hats. Here are kinds of hats that link you to another page that show more hats you can get.
Want to see all of the hats in one and other information about the kinds, or want to see other kinds of tiers in other words? Go to this page here if you want more.