How much is 1 acre of land worth in us?

Could you please provide me with an estimate on the current market value of one acre of land in the United States? I'm curious to understand the approximate range or median price per acre, and if there are any significant factors that might influence the value, such as location or the type of land. Additionally, I'd appreciate if you could briefly explain how the value of land typically fluctuates over time and what are some indicators to look out for when assessing the potential appreciation of a land parcel.