Answer: The best place to visit would be a WILDERNESS AREA.
Explanation: A Wilderness area can be defined as an unsettled and uncultivated tract of land left in its natural state; a barren land. This land is in its natural state and impacts from human activities are at its minimal.
In order to experience life in the least disturbed ecosystems in the United States, the best place to visit is the wilderness area because according to the definition of wilderness area, human activities are at its minimal and in its natural state.