You're allowed to visit the countryside to go for a walk, but only if you can get there by car! We're still not allowed on public transport unless it's an essential journey or going to work.
As a Londoner I am desperate to get out for a walk into the countryside but have no way of getting there. In normal times we get the tube or train there quite a lot. I just want one day out! I haven't been more than a couple of miles away from my home for ages now.
And yes I'm well aware of why the lockdown is in place and it's to save lives etc. I'm not disputing that. I'm still allowed to feel frustrated though!