The Photo Booth is a utility building that you receive after connecting to Facebook. It lets you take screenshots of your park and share it on Facebook. You will receive the card when connecting your game to Facebook for the first time.
Once owned, you can find the Photo Booth card in the Build menu under the Service category Utility tab. You need to place it and connect it with a path to access the Screenshot feature. You also need to be connected to Facebook to access the feature.
To enter the Screenshot mode, simply tap on the placed Photo Booth to open its Information Panel and tap on the camera icon.
You will need to allow access to your phone media storage to be able to save the screenshot in your device.
The Photo Booth is a special card that can be obtained only once, and does not level up.