There are many different ways to crop images such as a photo, landscape, portatif and many different shapes. This style of photograghy is interesting and can outline a point in the photo that you are trying to go for.
The discovery of background elements you didn’t realize were there. Issues with the framing or composition. To better focus on your subject, such as this..
Here is some of my own photos taken in St-Malo cropped and changed into different angles and shapes.
Here’s a few before and afters.
Here it is as a circle, before and after.
Here its done with loads of black and white colour/filter.
Here is a double imagine and a triangle image.
I did this on photoshop.
I just changed the colour of the background to black and white and moved the picture onto this image to get affect of us looking down on the people as we are ‘bigger’ which gives a cool illusion and affect onto the St-Malo project.