This walking group gained popularity by advertising their walks through TikTok. As a result, they’ve grown into a huge community, and around 500 joined their last walk. They organise scenic walks out of London, with details shared via their Instagram highlights. Walks with Overground often take half a day and are medium difficulty. All you have to do is pack a lunch and turn up. The group is still relatively new, so they are still finding their feet, but if you’re up for a solo adventure or day out with a friend, this group is heaps of fun.