La Palma, with 81,863 inhabitants covering an area of 708.32 km2 (273.48 sq mi), is in its entirety a biosphere reserve. For long it showed no signs of volcanic activity, even though the volcano Teneguía entered eruption last in 1971. On September 19, 2021, the volcanic Cumbre Vieja on the island erupted. It is the second-highest island of the Canaries, with the Roque de los Muchachos at 2,423 metres (7,949 feet) as its highest point. Santa Cruz de La Palma (known to those on the island as simply “Santa Cruz”) is its capital.