https://www.kamenica.sk/sk/content/rozsirena-realita-hraduIt is necessary to download and print the QR code, download and install the application. QR code: link to the code here:https://drive.google.com/file/d/1bkjBkKba9OxbjBG8Qjlfn2fblclubTNQ/view?pli=1 If you are in the castle, you will find the QR code there, you do not need to print it. It also works after pointing at a QR code opened on another phone, it doesnt have to be just printed.