Trinity Mystery Spot

This is a place in campus that I do not know what it is. I am curious to know how to get inside of it. I usually see it when I am around my dorm building. It is kind of neat!
I wanted to give the photo a black and white touch but I also wanted to keep the identity of Trinity which is the wonderful brick.
This place appears to me like some sort of home and that is why I added a rooster as  well as a mushroom.
I hope someone can explain to me what this place exactly is.