There are many cities close to Monterrey. Some of them would be Apodaca, Cadereyta or Saltillo.
None. Mexico has only one capital, which is Mexico City.
MEXICO
canada
Las Cruces
keep walking or fly to the second closest city to you.
Las Cruces is the 2nd largest city in New Mexico after Albuquerque.
On the outskirts of the city of Puebla.
Venus is the second closest.
Venus is the second closest planet to the sun.
France and Belgium are closest and Ireland is next.
Proxima centauri
In North America the most populated country is the USA, Mexico is 2nd, and Canada is 3rd. The United States of America currently has a population of 311,000,000 people, making it also the 3rd most populated country on Earth.