"Chuchunco City" is a generic name of an
imaginary city in
Chile. According with data from
GEONET, it looks like it's somewhere around
Rancagua.
The name "Chuchunco City" is used in various popular sayings, often with the meaning "a place very far away". "Chuchunco" itself is used as a metasyntactic variable in some situations.
"Chuchunco City" is also the name of a crappy fighting game, developed by Luis González. You can download the current version at http://www.lgm.cl/software/ch-city/. It was tested in Linux/i386 and MS-DOS.