Daylenn Pua, 18, set out alone to climb ... scrutinised the photos. And that’s when they spotted a mystery shape lurking in the background, which has been dubbed the “shadow man”.

stopping to take photos, fill my water bottle, have a snack, or explore a beautiful natural pool — all at my own pace. If having dinner alone intimidates you, bring a book or travel journal.

Yet many are following his lead and setting off alone. In the past decade Google searches for “solo travel” have more than doubled. In Britain the share of travellers going on holiday by ...