Boomtown
A boom town is a place that has very quick population and economic growth. Boomtowns are usually mining towns where an important mineral resource such as gold, silver, or petroleum has been found. It can happen, for example in a gold rush. Gold rush towns usually shrink and disappear after the gold is dug up. They become ghost towns.
The word can also be used for places that grow for other reasons. This can be the town being near a major city, in a nice climate or near a popular attraction.
Some examples of California boom towns are Columbia (not the country) and San Francisco.
Boomtown Media
World's Richest Acre Park in Downtown Kilgore, where the greatest concentration of oil wells in the world once stood in Kilgore, Texas, United States
Trieste, Italy, from the opening of the free port, a boomtown of Central Europe in the northernmost part of the Adriatic.
California attracted tens of thousands of gold prospectors during the Gold Rush of 1849.
San Francisco in 1851, during the heyday of the California gold rush.