I guess you mean the Baja California Peninsula. It is one of the most visited regions in Mexico by American tourists. Some famous cities found there are Tijuana (right across the border to San Diego, California), Ensenada, Rosarito and Los Cabos.
Battle of San Pasqual, California
Amusement park
The famous place that appeared in his weiting is Salinas, California .
In Mexico, Texas and California.
Los Angeles, California
vegas river
Berkeley, Beverly Hills
Trinity Site, Carlsbad Caverns, Taos Pueblo,
El Alamo
"New Mexico is the most completely beautiful place I have ever seen"- Ansel Adams
A deserty and rugged place with some mountains. Its also owned by Mexico.
There is one answers to this question... if the peninsula is Baja California, then is owned by Mexico... (THE ANSWER IS MEXICO) if you are not talking about Baja California then I don't not know the answer to that!!!!! SORRY :( :( :( :(