So if you're observing a rain forest in Central America or a high mountaintop in South America, and you see some strange patterns or interestingly-stacked rocks

So if you're observing a rain forest in Central America or a high mountaintop in South America, and you see some strange patterns or interestingly-stacked rocks, you think we should only look for non-human explanations for these things? With this attitude, much archeological evidence of pre-Columbian civilizations would never have been found. In fact, the entire field of archaeology wouldn't exist.