[0] https://en.wikipedia.org/wiki/Winnemucca_Lake [1] https://en.wikipedia.org/wiki/Spirit_Cave_mummy#Dating
For another example, most neighborhoods in eastern phoenix are built on top of old Hohokam villages, adjoining older basketmaker sites. The canals throughout the city often follow the old Hohokam canals. Fun fact, the Intel Chandler campus is on top of old hohokam suburbs of Pueblo de los muertos, which is buried under the modern suburbs.
It felt like a mix of rightful wariness due to untrustworthy opportunistic anthropologists from the 19th and 20th century along with taboos that developed due to some sort of collapse.
In the US you can find truly wild places, but it is pretty hard to find places untouched by man. Humans have been here for at least 15000 years, and from the very beginning were having huge impacts on the ecology.
There is also a district of the city that contains NIMBYs and other fossils, by a similar name.
(La Brea means "the tar").
A bit west of downtown, too, but I'm an annoying pedant.