Chimborazo
The peak of Chimborazo is the farthest point from the center of the Earth. This is due to the Earth bulging out at the equator and Chimborazo being located just one degree south of the equator. Mount Everest is 28° north of the equator. Thus Chimborazo is 2.1 kilometres farther from the Earth's center than Everest. Chimborazo is 73.5 metres higher than the highest mountain in North America. Chimborazo is often associated with the nearby volcano Cotopaxi, although the two volcanoes have completely different structures.
Carihuairazo
Carihuairazo was climbed by Edward Whymper, the cousins Louis and Jean-Antoine Carrel, and Ecuadorians David Beltran and Francisco Campaña, during their 1880 Ecuador expedition. It is not entirely clear from Whymper's description, but some people believe that they climbed the "Mocha" (4,960m) and not the "Maxim" summit (5,018m). The first ascent of the "Maxim" summit is therefore attributed to Arturo Eichler, Horacio Lopez Uribe and Jean Morawiecki in 1951. Whymper and his companions ascended in cloudy conditions, believing the east peak (Mocha) to be the higher one. When the clouds cleared on their descent, Whymper said they could see they had climbed the west peak. It is likely that he meant the central summit, which is just west of Mocha.