Ambato, Ecuador
Ambato lies in the main valley of the Central Cordillera, the highest of the Andean mountain ranges. The city itself is carved into the side of Cerro Casigana, the mountain that dominates the north end of the city. From Ambato, it is possible to see many snow-capped volcanoes including Cotopaxi, Tungurahua, Carihuairazo, and the largest mountain in Ecuador, Chimborazo. Tungurahua lies about 40 kilometers to the southeast. The threat of eruption from the volcano is constant. On May 16, 2006, Tungurahua erupted, covering the city with a thick layer of ash.
Riobamba
Riobamba (, full name San Pedro de Riobamba) is the capital of the Chimborazo Province in central Ecuador, which is located at the Chambo River Valley of the Andes. It is south of Ecuador's capital Quito and located at 2,754 m on the Avenue of the Volcanoes. The city is an important regional transport center as well as being a stop on the Pan-American Highway that runs through Ecuador. Riobamba stands as one of the largest cities in the central portion of Ecuador's Sierra region.