Spiti valley is located on indo Tibet border, hence has a major influence of Buddhism. A perfect place to learn more about the religion.
Ladakh is also a perfect destination if you want to study and experience Buddhism. Many old and historical Monastery's provide detailed Information about the religion.
Dharamshala is home to current Dalai lama and also acts as a center of learning for Buddhism.
Bodh Gaya is birth place of Buddhism. Many monastery and Ashrams in Bodh Gaya are source to Information about the relgion.
Tawang is another important place for Buddhists. Tawang Monastery is also one of the oldest monastery in India.
Rumtek Monastery is a learning center for many Buddhist Followers.Many Intellectuals around the world visit Rumtek to study Buddhism.
Tashi Kyil monastery in Dehradun is a Old sacred Buddhist monastery. A religious center to study more about Buddhism.
A peaceful and wonderful monastery in sikkim has lot to offer if you are keen to study Buddhism.