Megasthenes (c. 350 BC-290 BC) was a Greek traveller and geographer. He was born in Asia Minor and became ambassador to Seleucus I of Syria and to Sandrocottus of India. His observations were recorded in Indica, a work that served as an important source to many later writers such as Strabo. He describes such features as the Himalayas and the island of Sri Lanka. He also described India's caste system.