Deer Park in Sarnath is of great significance to the Buddhists because it was here that Gautama Buddha first preached Dharma. It is also here that the first Sangha came into existence when Kondanna, the first arihant achieved enlightenment and formed the Buddhist Sangha.
If you are visiting Deer Park, you may also wish to visit Singhpur, a village which is about a kilometre away. The village is the birthplace of Shreyansanath, the eleventh Trithankara of Jain faith. There is a temple dedicated to him and is an important pilgrimage site for the Jain community. There is also a temple dedicated to him.