Thames Source

The Thames doesn't just appear fully formed - it starts as a trickle in the Cotswold hills near Cirencester, and if you're the type who likes to see where famous things begin, the source is worth tracking down. It's less dramatic than you might imagine. There's no thundering cascade or sudden gush of water; instead, you'll find a modest spring emerging from the chalk downland, marked by a stone and a small monument. The walk itself is the real attraction here - gentle rolling countryside, dry stone walls, and the kind of quiet that makes you remember why people come to the Cotswolds in the first place.

History buffs and geography enthusiasts will get the most from it, though families with older kids who enjoy gentle countryside walks won't regret the detour. Allow an hour or so for the walk and to take in the moment - it's not a destination you'll spend the afternoon at, but it's the sort of thing you feel genuinely pleased about afterwards. There's no visitor centre or facilities to speak of, so bring water and wear proper walking boots; the ground can be boggy depending on rainfall.

If you're based at Hoburne Cotswold Holiday Park - the best-rated option nearby - this makes a straightforward morning outing before heading into Cirencester for lunch. It pairs well with exploring the wider Cotswold walking routes, or as a stop between visiting the Roman town itself and the parks clustered around the area.