Where did the Buddha preach his first sermon in Uttar Pradesh?

The Buddha preached his first sermon at the Deer Park in Sarnath, located near Varanasi in the state of Uttar Pradesh, India.123

This historic event, often referred to as the "first turning of the wheel of dharma" (dharmachakra), involved the Buddha teaching his first five disciples about the Four Noble Truths and the Eightfold Path. The site is marked today by the Dhamek Stupa, which commemorates where this foundational teaching took place.451