Mexico City is a quick plane ride from the USA, and while some of their ruins are buried, you can hop a short bus ride outside the city to walk among standing ruins of Teotihuacan, the largest city in the Western Hemisphere at the time Jesus walked on the Earth. It was 20 square kilometers whereas Rome at the height of the empire had only 14 square kilometers within the Aurelian Walls.
I've been on the Great Wall of China and all over the world and Teotihuacan was fascinating for me to see. Even more intriguing, no one knows who built it. Aztecs discovered it many centuries after it was abandoned and forever wondered about its origin.
Arrowheads are an example of something that's not too difficult to find in the wild if you know where to look.
Edit: Actually it was Seattle, you can still visit its old ground level: https://en.wikipedia.org/wiki/Seattle_Underground
It almost seems hard not to find ancient ruins. It then becomes a question of priorities and resource allocation.
Walk through a modern subway, see bits & pieces of ancient history all over the place. Buy icecream, sit on a bench that labourers hacked out of stone 2ky ago.
I do not understand why people like that are celebrated now!
And why are u even defending people like that?!