Yes, Tang was really a fascinating period in the sense that it was an open, dynamic and multicultural society and really saw a lot of interaction with other main civilizations (the later dynasties tended to find the pathway to the west blocked by steppe nomad). Its strength was due to the openness, inclusiveness and meritocracy, which Modern China can still draw useful lessons from. It had seen talent people from different races promoted to high offices in both administrative and military institutions, which is rare in the later dynasties. The fact that Tang has expanded to the Central Asia lead to the flourish of Silk Road with safe passage of goods/traders and people exchange with other great civilizations like India and Middle East.
The most famous Tang traveler to India was undoubtedly Xuanzang, who spent about a decade in India, Nalanda more precisely, a far famed metropolis of Buddhist education. He was credited to be the first diplomat to establish relations between Tang Dynasty and Indian empire of Kannauj.
2 interesting things I read about his work were that 1. the total number of texts he brought from India to China is estimated 657 (I am curious who he carries this many books over the long trip back home without a car). 2. Apart from translating the Indian text he brought back, he apparently also translated the Dao De Jing (literally: virtue classics) of Laozi into Sanskrit and sent it to India in year 647 (not sure whether his contact received it).