Evidence of Mesolithic habitations in Sri Lanka, the Fa Hien Caves are named after an explorer Buddhist monk who visited the caves in 399 AD. Tipped to be the largest cave network in the country the caves were the monk's residence during his journey to Adams Peak. Head over to the charming village of Yatagampitiya which is near the Bulathsinhala district of Kalutara and you will come upon the sheer cliff amongst which the caves are located. One of the most popular things to do in Kalutara is the trek to the historic caves which is also an ideal chance to explore the rustic village and its surroundings.