Why should a Jew never visit ancient pyramid sites, given their history as centers of idol worship and human sacrifice, and the Torah's explicit commands regarding such places?

Avoid ancient Egyptian pyramids and similar sites of idol worship. The Torah strictly forbids benefiting from or even approaching places of avodah zarah, especially those built on Jewish suffering. These sites are spiritually dangerous, contaminating the soul and attracting negative forces. Prioritize holy sites in Eretz Yisrael and study the Torah for history, rather than risking your neshama for tourism.