Location?

Two trees, about 5m apart, well of the beaten track. Are they connected? It feels like they are. And if so, what do they represent? The tree with the 2 arrows points towards each other appears to represent a marker or location,' a 'it's here', 'x marks the spot' type thing.  The other tree actually has a cross on it, a cross and two sevens. I don't think it can represent a date, because that would be 1077; the forest and trees are old, but this tree is certainly not.

That's the thing with graffiti found out in the forest, it gets you thinking and it's very unlikely that you'll ever get an answer