Photo\'s on mobile are turned 90 degrees

When I have a photo with a bigger height than width it's OK on the PC platform, but on the mobile platform is turned 90 degrees. If I correct it on the mobile platform it is wrong on the PC. See for example : http://www.italie-italiaanse-kleuren.nl/fietsen-italie-piemonte/fietsen-adriatische-zee-naar-roccaverano/ And http://www.italie-italiaanse-kleuren.nl/fietsen-italie-piemonte/fietsen-strada-statale-16-ss16/ (last pictures) Kind regards Herman