2 Kings 23:8-12

And [Josiah] brought all the [idolatrous] priests out of the city of Judah and defiled the high places, where the priests had burned incense, from Geba to Beersheba [north to south], and broke down the high places both at the entrance of the Gate of Joshua the governor of the city and that which was on one's left at the city's gate.

However, the priests of the high places were not allowed to sacrifice upon the Lord's altar in Jerusalem, but they ate unleavened bread among their brethren.

And Josiah defiled Topheth, which is in the Valley of Ben-hinnom [son of Hinnom], that no man might ever burn there his son or his daughter as an offering to Molech. [Ezek. 16:21.]

And he removed the horses that the kings of Judah had devoted to the sun from the entrance of the house of the Lord, by the chamber of Nathan-melech the chamberlain, which was in the area, and he burned the chariots of the sun with fire.

And the altars on the roof of the upper chamber of Ahaz, which the kings of Judah had made, and the altars which Manasseh had made in the two courts of the house of the Lord, [Josiah] pulled down and beat them in pieces, and he [ran and] cast their dust into the brook Kidron.