San Diego is the 2nd largest city of California ,
the 8th largest city of the USA  and the xxth largest city of the World .
The city is located on the Pacific Ocean
in the very South of California
bordering Tijuana, Mexico.
San Diego has a mild Mediterranean climate with an annual
mean temperature of 18°C. The east of the city becomes moutainous

The name San Diego comes from a flagship called "San Diego or St Didacus"
with which Sabastian Vizcaino arrived in November 1602.
St Didacus is a Spanish Catholic Saint whose name was used to name the area
be the Spanish.
During the times of the Gold Rush in 1850,
San Diego was incorporated as a city and
designated to become the seat of the new San Diego County.

Today San Diego lives from Tourism,
Ship Building, Computer Science, Electronics, Biotechnology
and Agriculture.