What Were the Bamot, and Why Did They Make the Biblical Prophets Angry?

The prophets repeatedly denounced their fellow Jews for worshiping at bamot (singular bamah), usually translated as “high places.” Yet other biblical passages seem to suggest that worship at bamot is unobjectionable, as long as God (and not some pagan deity) is being venerated. Although the bamot are generally taken to be hilltop shrines, many archaeologists and Bible scholars think they were actually man-made mounds. What was wrong with them?