Yeah, that seems like opposite of Georgism. You don't have to look very far to find examples of land being worth much more than what's built on it, that's the case in much of the US.
I would disagree and say that most land is cheap in the US.
I'm not saying that it's the case for most land, I'm just saying that the land that people live and work it's not uncommon. Over 80% of Americans live in urban areas.