Sigiriya is a UNESCO World Heritage Site and an ancient rock fortress, sitting on the top of a massive rock column some 200 m (656 ft) up. The fortress dates back to the 5th century. However, this site was also used as a monastery back in the 3rd century. The ruins of a city can also been seen here. There is a restful garden at the base of the rock and some rather steep steps taking visitors up to the fortress itself.