Creating a website that tunnels to other sites?

I would like to create a webpage that basically just tunnels into whatever other site you enter.

So if I go to http://ift.tt/2fcdv0m it will go to Reddit and display it on my page. Basically it's like a proxy except I'm somewhere I can't change my browser's proxy settings, but would like to view blocked pages.

Mysite.example.com is unrestricted but Reddit.com is.