Arequipa, located in southern Peru, is that nation's second largest city. It is also the capital of the Arequipa Province, and is 633.8 miles from Lima. The city lies in the highlands at the foot of the snow-capped volcano El Misti. El Misti is currently inactive, but erupted strongly between 1438 and 1471. Several smaller eruptions have occurred since then, most recently in 1784. Arequipa has over 80 volcanoes which can be found in the Valley of Volcanoes. Arequipa has many fine colonial-era Spanish buildings built of sillar, a pearly white volcanic rock used extensively in the city, and from which it gets its nickname La Ciudad Blanca ("the white city"). The historic centre of Arequipa was named a UNESCO world heritage site in 2000, in recognition of its architecture and historic integrity. The city is located at an altitude of 2,380 meters (7740 feet) above sea level. El Misti is located besides a bigger volcanohachani "the Beloved" and the pike Picchu Picchu "Top Top" - both named in the Quechua language of the ancient Inca Empire.