Yup, that would be my first suggestion. Big piece or a couple big pieces of drift wood.Get a large piece of driftwood, stick some anubias, java fern, and java moss on it, they are slow growers but will look very nice after a year. May be very simple, but also helpful if you want to move it to another tank.
Ideally, go to a nice beach and get your own. Lots of choices and it's fun!