Looking for some sort of unity thing to do. Something that not everyone else is doing. After looking On Pinterest here is what I have found.
Hand fasting/ binding of hands
trying the knot
time capsule/ memory box
love letter box (open after first fight)
anniversary box, letters of why you got married and wine and then replace with new letter and new wine every year.
A cord of three strands (a braid)
any my other ideas other than the candle, sand, and planting a tree.