The history of India, one of the largest and oldest civilizations, dates back to 5000 years when the Indus Valley civilization flourished between 2500 and 1700 BC. With the recent discovery of a complete city resurrected in the Gulf of Cambay in Gujarat, India can now boast an age-old civilization, dating back over 7000 years ago. The remains of the Indus Valley civilization can still be visited in places like Kalibangan in the northwest of the country. Later the Aryan tribes arrived from the northwest. It was their fusion with the inhabitants of the area that created the classical Indian culture.