Gentle warm climate, beautiful landscapes, a fairly well-developed tourism infrastructure and cheap prices contribute to this. Some popular resort cities in the southern Pacific Coast include Acapulco, Huatulco, Puerto Escondido and Ixtapa-Zihuatanejo.
Note however, that the most popular destination in Mexico is the "Mayan Riviera", along the Mexican Caribbean coast. It includes cities such as Isla Mujeres, Cancun, Cozumel, Playa del Carmen and Tulum.
The reasons why so many international tourists visit Mexico's Southern Pacific, would include warm climate, cheap prices and friendly people.
Beautiful beaches and landscapes, vibrant night life, cheap prices and friendly people would factor in.
See related links for a couple of reasons
I guess you mean "resort" on the southern Pacific Coast. That would be Acapulco.
The Pacific Ocean.
Acapulco on the Pacific Ocean and Cancun on the Caribbean Sea are the largest tourist resorts in Mexico.
Mexico has thousands of kilometers of beachfront bordering the Pacific Ocean, Caribbean Sea and Gulf of Mexico.
Mainland Mexico, as well as the southwestern US, specifically southern California, Arizona, New Mexico and southern Texas.
Pacific Northwest, Southern Uplands and more
Only the Pacific Ocean.
Those would include Chiapas, Oaxaca and Guerrero, on the southern Pacific Coast.
Northwestern Mexico borders southern California and the Pacific Ocean. If you mean what is that large but slim peninsula protruding from southern California and is separated from mainland Mexico, it is the Baja California Peninsula.
It is in the state of Oaxaca, on Mexico's southern Pacific coast. See related links for its place on a map.
The state of Guerrero is located in southern Mexico, having shores along the Pacific Ocean.
No. It is along the Gulf of Mexico coast.