Being an extension of the Taihang mountain range from the Hebei Province, the Western Hills covers approximately 17% of the Beijing municipality, including most of the Mentougou and Fangshan Districts as well as parts of Changping, Haidian, and Shijingshan. The elevation of the Western Hills range is between 100 m to over 1900 m above sea level and is visible from the city on clear days. A mix of deciduous and coniferous forests and highland meadows cover much of the Western Hills. Mountain streams feed into the Yongding and Juma Rivers, which flow through the Western Hills to irrigate the plains of Beijing. Coal is mined in Fangshan and Mentougou Districts. Natural and historical points of interest include river gorges, and hot springs, as well as temples, historic homes, secluded retreats and ancient ruins.