'Hills' in the Bible

So Micaiah said:I saw all Israel scattered on the hillslike sheep without a shepherd.And the Lord said,“They have no master;let each return home in peace.”

Jehoram also built high places in the hills of Judah, and he caused the inhabitants of Jerusalem to prostitute themselves, and he led Judah astray.

Since he had many cattle both in the Judean foothills and the plain, he built towers in the desert and dug many wells. And since he was a lover of the soil, he had farmers and vinedressers in the hills and in the fertile lands.

He sacrificed and burned incense on the high places, on the hills, and under every green tree.