Ancestry has a free weekend on many of its world databases (until Midnight 1 September). This collection of images is from the Mexico Historical Postcards database. The first image below shows the Cathedral in Hermosillo, Sonora. The back of the card is dated January-March 1941. This is a view my 2nd-great-grandmother Teresa Diaz would have seen before she moved to Tucson in 1922.
Source: Ancestry.com Mexico Postcards
Source: Ancestry. Palacio de Gobierno, Hermosillo, Sonora
Source: Ancestry. Guaymas, Sonora.
The postcard above shows the port of Guaymas, Sonora. The card was sent in May 1909. My third-great-grandfather Gabriel Vasquez likely arrived in Mexico at this port.