mid 16th century (in the sense ‘investigate (why)’): from French explorer, from Latin explorare ‘search out’, from ex- ‘out’ + plorare ‘utter a cry’
If the grass is greener on the other side, then if the guy on the other side is looking at me, does he think my grass is greener when his is the greenest? And if his IS greenest, how did he do it? (Contributed by Cayce)
nicesimplethings 
Nice Blog with Excellent information
Is that Parc Güell ?