I want a totally fake fireplace, what is that called?

I have bought a new home, and I subscribe to "Better homes and gardens" I am looking into different decorating ideas and I love the living rooms that are decorated around a fireplace. My new home is newer and does not have a fireplace. Is it possible for me to buy a totally fake fireplace? Just for looks. I dont even care if it can actually light up. I just want to have a pretty mantel etc. If its possible what are some good online shopping sites?