An expert has urged parents to stop carrying their babies up one of the world’s busiest mountains in the hope of capturing a selfie. A mountain guide and hiking expert has criticized parents who bring babies and young children on challenging mountain climbs in pursuit of a picture-perfect photo. Yr Wyddfa is Wales’ highest mountain and is climbed by over 600,000 walkers every year. North Wales Live reports that taking babies to high-altitude locations is generally discouraged because their lungs and bodies are still developing. However, Yr Wyddfa — which stands at 3,560 feet — is below the altitude where thinner air is typically considered a major concern.