Sigiriya, an ancient rock fortress and former royal palace, is one of Sri Lanka's most visited and best-known sights, attracting just more than one million visitors in 2019.

Sri Lanka's coastal drinking water supply continues to suffer the effects of the December 2004 tsunami. Some 40,000 shallow wells were destroyed or contaminated by the tsunami.

According to FAO data, Sri Lanka is currently subjected to 90.8% water stress: this means that water consumption is equal to 90.8% of available freshwater resources.