The spell Leomund's Secret Chest says this:

You hide a chest, and all its contents, on the Ethereal Plane. [...]

Where in the Ethereal Plane does the chest go?

Is it possible for someone to travel through the Ethereal Plane to find a secret chest?
I'm asking about this part as well because depending on where it's hidden, it may be either easier or harder for someone to track down a secret chest.