no, the view from the north of this valley would land somewhere i just described

#madeira

i doubt the best telescope could reveal these land masses from my position even given impossibly ideal conditions of line of site without clouds unto the edge of the horizon

pretty sure that you would notice that the clouds meet with the horizon in such a case... might take a while to catch such a view though, usually there is a lot of haze... it's pretty warm down here, i guess it goes with it... but without seeing said northern lands in my telescope, or even a trace, and seeing clouds loop down to the ground, i think the flat earthers are disproven