12 Stones

"When the whole nation had finished crossing the Jordan, the Lord said to Joshua, "Choose twelve men from the people, one from each tribe, and tell them to take up twelve stones from the middle of the Jordan from right where the priests stood and carry them over with you and put them down at the place where you stay tonight" This is to serve as a sign among you, in the future"
Joshua 4:1-3, 6

It was simply a memorial to God, not an idol. He meant for it to be built and move on, His intention is not for us to stay at the river although it is a great victory, but to move forward to what He has promised us no forgetting what we have endured for His sake and what we have gone through for His name. We cannont forget the mountain experiences in the valley. However if we stay at the river to worship the stones, then we have lost. Instead of worshiping the stone, worship the one who has brought us through the river.