Where is Ebenezer?

In the well-known hymn “Come Thou Fount of Every Blessing,” we sing:

“Here I raise my Ebenezer;
hither by thy help I’m come;
and I hope, by thy good pleasure,
safely to arrive at home.
Jesus sought me when a stranger,
wandering from the fold of God;
he, to rescue me from danger,
interposed his precious blood.”

Is Ebenezer an actual place or a parable? Let us read what the Bible has to say about it.