Valley of Ten Thousand Smokes The ash-filled valley covers a area. The ash can be up to deep. In places deep canyons have been cut by the River Lethe, allowing observers to see the ash flow strata. Since the ash has cooled, most of the fumaroles are now extinct and despite its name the valley is no longer filled with 'smoke' (i.e. steam). Vegetation still does not grow in the valley. The signs of volcanic activity are still visible on nearby hills. Katmai's most recent eruption was in 1927, but there have been non-eruptive events as recent as 2003. The Alaska Volcano Observatory still monitors
The Metropolitan Area of the Aburrá Valley Poblado, which ultimaltely reached the city of Envigado, while the working class population of Medellín reached cities to the north (Bello) and the southwest (Itagüí). The Metropolitan Area of the Aburrá Valley borders with the municipalities of Ebejico, Heliconia, Angelopolis and Amagá to the west, with the municipalities of Santa Barbara and Fredonia to the south. To the southwest it borders with the Eastern Antioquia region and to the north with the municipalities of San Jeronimo, San Pedro and Don Matías covering a total area of 1,152 km². The largest being the territory of the municipality of Medellín with 382