Mexico, officially the United Mexican States, is a federal constitutional republic in North America. It is bordered on the north by the United States of America; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of Mexico. Covering almost two million square kilometres, Mexico is the fifth largest country in the Americas by total area and the 13th largest independent nation in the world. With an estimated population of over 113 million, it is the world's eleventh most populous country and the most populous Spanish-speaking country. Mexico is a federation comprising thirty-one states and a Federal District, the capital city. Wikipedia
Mexico is a country recently associated with drug related violence plaguing it's northern border with the United States. In spite of this, most of the country is very safe for travelers, and the recent decline in tourism has helped lower prices, as well! Those concerned with safety should stay far away from the border, especially avoiding cities such as Tijuana and Ciudad Juarez. Relative to its neighbors to the north, Mexico is a very affordable destination.
There are plenty of buses running all around the country, but for longer distances the budget airfare within the country might save you both stress and money. Always consider doing a quick fare search before embarking on a 24-hour bus ride. Your butt will thank you.
The south-western coast, including popular destinations like Puerto Vallarta, Mazatlan, and Ixtapa, is popular for a reason. The pacific coast enjoys great weather, decent surf, and warm ocean water for beach-goers. Generally smaller, less-touristy towns will get you more bang for your buck, in addition to more time rubbing elbows with locals.
The Caribbean side of Southern Mexico is also home to some incredible beaches and warm water. The jungled regions of the South, especially along the Yucatan Peninsula, are home to numerous Mayan ruin sites which are also popular destinations.
Mexico City also poses as an interesting destination, providing a look at and exciting mix of Meixcan culture and tradition. Built on the site of a former Aztec city, the most central area of the city now holds roughly 9-million people, making it one of the 10 largest cities in the world. The greater metropolitan area surrounding mexico city is second in size only to the enormous Tokyo Metropolis.