The Isthmus of Tehuantepec
http://www.britannica.com/eb/article-9071555/Isthmus-of-Tehuantepec
The isthmus of Tehuantepec is located in southeast Mexico.
Baja California is the thin but long peninsula on northwestern Mexico, protruding from southern California. The Isthmus of Tehuantepec is the thinnest region in Mexico, separating the Gulf of Mexico and the Pacific Ocean.
The isthmus of Tehuantepec is in southern Mexico. It separates the Gulf of Mexico and the Pacific Ocean. Before the Panama Canal was built, crossing the isthmus on foot was one of the best ways to get from the Atlantic to the Pacific.
Some of them include: Sierra Madre del Sur, a mountain range crisscrossing southern Mexico from western Michoacan down to the border with Guatemala. The Lacandon Jungle, an extensive rainforest located in the southern state of Chiapas, bordering Guatemala. The Tehuantepec Isthmus, the thinnest portion of mainland Mexico separating the Gulf of Mexico from the Pacific Ocean, passing through the southern state of Oaxaca.
No. "Mexico" is too big to be considered as such. It however, has an isthmus, connecting the Gulf of Mexico with the Pacific Ocean. It is known as the Isthmus of Tehuantepec.
Mesoamerica is located on the isthmus that connects North and South America. It covers the region that includes southern Mexico, Guatemala, Belize, El Salvador, Honduras, Nicaragua, and Costa Rica.
The Isthmus of Tehuantepec is a narrow strip of land in southern Mexico, separating the Gulf of Mexico from the Pacific Ocean. It is located in the state of Oaxaca.
On the southern coasts of Mexico.
It is on southern New Mexico (the US state), but it is located on northern Mexico (the country).
The Isthmus of Panama connects Colombia with the countries north of Panama. The Isthmus of Panama is located in Panama.
If you mean the Peloponnesus, it is the southern part of Greece, almost an island but connected to mainland Greece by the Isthmus of Corinth.
The name of the gulf located east of Texas west of Florida and north of southern Mexico is The Gulf of Mexico