That would be the Popocatepetl Volcano
http://en.wikipedia.org/wiki/Popocatepetl
closest mountain
Mexico City itself contains several landmarks, such as the Independence Monument, the hill, park and castle of Chapultepec or the Ajusco mountain range, located south of the city but within the city proper.
Two of them would be the Ajusco mountain, just south of Mexico City, or the Popocatepetl volcano, some 70 kilometers (43 miles) southeast of the city.
The city in Mexico closest to the equator is Tapachula, located in the southern state of Chiapas. The city lies at approximately 14 degrees north latitude, making it one of the closest cities to the equator in Mexico.
The city of Toluca (pop: 1,610,786) is 56 kilometers (35 miles) east of Mexico City.
San Diego Padres
The city of Reno in Nevada is closest to the Sierra Nevada mountain range.
Mexico City is the capital of Mexico. The closest river tat is located nearest to Mexico City is called the Rio Grand River.
monterray
The Mexican city closest to Florida is Cancun. Cancun is located in the eastern part of Mexico, on the Yucatan Peninsula, which is the closest point in Mexico to the state of Florida in the United States. The distance between Cancun and Florida is approximately 500 miles across the Gulf of Mexico.
The city of Acapulco (16°51'59''N 99°52'57''W) is the closest beach resort, some 411 Kilometers (256 miles) south of Mexico City. However, the closest beach to Mexico City is Tecolutla in the state of Veracruz, 340 Kilometers (212 miles) northwest of the city.
Carlsbad, Hobbs, and Jal are the closest New Mexico cities to Odessa, Texas.