Ecuador
Ecuador's capital is Quito, which is in the province of Pichincha in the Sierra region. Its largest city is Guayaquil, in the Guayas Province. Cotopaxi, just south of Quito, is one of the world's highest active volcanoes. The top of Mount Chimborazo (6,268 m, or 20,560 ft, above sea level), Ecuador's tallest mountain, is the most distant point from the center of the Earth on the Earth's surface because of the ellipsoid shape of the planet.
Tulcán Canton
Most of the population of the canton is in the Andes, especially in the city and surroundings of Tulcán, but the land area stretches into the Andes foothills to the west. Tulcan has the highest elevation of any city in Ecuador, above sea level. The northern limit of the canton is the border with Colombia with the most important land passage between the two countries at Rumichaca Bridge.