If you want to explore the many characteristics of the new Microsoft Windows Server 2016, without buying the software, you can download an evaluation copy from the TechNet Evaluation Center. The evaluation copy is valid for 180 days.
Here is the site: https://www.microsoft.com/en-us/evalcenter/evaluate-windows-server-2016.
Here are some of the resources that are available:
You will have to sign in and you will have to provide your details to get the copy.