While it is possible to create a panoramic image by cropping a photo so that it is narrower, your resolution won't change so your panorama won't be sharp and you won't have as much detail. Instead, try creating one from a series of images and joining them together using Photoshop. Continue on to learn how I created this image!
Here are the five individual images I made with this project in mind. Notice that each image overlaps the next one a little bit. We do this so Photoshop will be better able to align them when it creates the panorama. Also, I wait to do any editing until after the image has been stitched together. That way, there won't be any differences between each image in regards to color, contrast, vibrancy, etc.
This window will open where you can set the parameters and load your images. In the layout section on the left side, I left it on Auto. This usually does a pretty good job. Also, in the middle bottom, I checked the Blend Images Together option. Next, I clicked on the Browse button to import the images I wanted to use.
Here is the panorama cropped to my satisfaction. Next, I decided to do a little bit more editing because it looks a little dull. On a side note, you might notice the Layers panel on the right has each of the five images as layers and the mask shows which part of each image was used for the final panorama (the white areas).
In the previous step, I mentioned the layers. Before I edited the image, I decided to go ahead and bring everything into a single layer. To do this, I went to Layer > Flatten image. To finish it up, I adjusted the contrast and upped the vibrancy a little. I hope you found this useful and will explore creating your own!