Inamgaon, located in Maharashtra, is a well-known Chalcolithic site that provides significant insights into early agricultural communities and their way of life during that period. Mangadu in Kerala is recognized as a prominent Megalithic site, characterized by its ancient burial monuments and associated rituals. Chandraketugarh is actually in West Bengal and is primarily known for its historical significance as a town, not specifically as a trading port in the same context as some other sites. Salihundam, situated in Andhra Pradesh, is primarily an important Buddhist site with stupas and monastic remains, rather than rock-cut cave shrines.