Agua Fria was place along the Agua Fria River and currently within the boundaries of the City of El Mirage. In the 1800s the entire western U.S. was mapped out by the USGS (US Geological Survey). They set markers for future surveying and subdividing by laying out a grid system of Townships (6 miles wide running east/west) and Ranges (6 miles wide running north/south). Each TWP/RGE contained 36 sections of land (1 mile square). Within these USGS maps they also noted populated places. One such place was called Agua Fria. Technically, by current definition, it was not a town. But to the people who lived there I'm sure they thought of it as their town. Here is the link to that USGS "populated place" location designation. http://geonames.usgs.gov/apex/f?p=136:3:0::NO:3:P3_FID,P3_TITLE:511,Agua%20Fria

This song's references to the city of El Paso, nearly at the western tip of Texas, have been noted in a previous post. These lyrics additionally make reference to the US state of New Mexico, whose southern boundary is just north of El Paso.

Greenwich Village is a neighborhood in New York City, New York. Incidentally, since the location clearly indicates a setting in the Northern Hemisphere, the reference to "the summer August sun" is a redundancy. In the Northern Hemisphere, summer is the only season in which August can come.

Refers to Laredo, Texas, a border town along the Rio Grande.

Refers to the north Texas city of Amarillo, in the Texas panhandle. Incidentally, its name is Spanish for "yellow".

The country of Mexico is referred to herein, as is also a major metropolitan area in the US, the Kansas City area. The latter straddles the boundary between the US states of Kansas and Missouri. There are actually two adjacent cities named Kansas City there. The name comes from their location, where the Kansas River flows into the Missouri River. The larger of the two named Kansas City is on the Missouri side, and hence it is the one most usually referred to. But Kansas City, Kansas, to its west, is a city of considerable size as well.