In my slightly younger days I cleared all this land(part of my brothers estate) with a hand sickle,saw and a scythe. Originally the brambles were some four to six foot high and no grass just a muddy track. up on the right was a magic pond that I also cleaned.(bottom picture)
I could have done it in a fraction of the time using a motorised strimmer but I hated the noise in such a peaceful place, anyway motors are only good on motorcycles.
In my next life I want to be a forester assuming there are any forests to clear and assuming the owners don't mind them being cleared by hand.
I am thankful That I got so much pleasure from this little piece of land....Much better than going to the pictures or even a decent party.