All during this period tin mining was booming, and as one of the most tin-rich of Thailand's tin bearing locales, Phang-nga attracted increasing attention from the central government because of its importance as a foreign exchange earner. When the worldwide economic depression of the 1930s struck.
Thailand, Phang-nga's status was further enhanced by incorporation of Takuapa as a district (1931). One of Phang-nga Town's most beautiful old buildings is the Provincial Hall. The first such structure was built in Ban Chai Kai; a larger one was constructed in 1930 at Ban Tai Chang. The present structure near Poong Chang Cave was built in 1972.