I love this type of postcard--one sent my a regular service member writing home to show something that's important to him or part of his daily life.
This postcard is from C. Eckhardt of the USS Denver and shows a panoramic view of Mazatlan Mexico (or as he writes "Maztland") On the back of this we see he's written this message: "Maztland Aug. 14th 1916 A very good voew of Matzland taken from one of the high hills w[h]ere they have hidden several large guns [signed] C.E."
It appears to me that his is not 'taken from a nearby hill' as the angle is so sharp and the buildings in the extreme foreground are so close.