From where did David first see Bathsheba bathing?

Answer: The roof of his palace

One evening David walked on the palace roof and saw a very beautiful woman bathing. He learned that she was Bathsheba.

“One evening David got up from his bed and strolled around on the roof of the palace. And from the roof he saw a woman bathing—a very beautiful woman. So David sent and inquired about the woman, and he was told, “This is Bathsheba, the daughter of Eliam and the wife of Uriah the Hittite.””— 2 Samuel 11:2-3 (BSB)