1. get in an airplane and fly West and keep flying west.
2. get in a Boat and sail away from the shore and watch the shore line and the mountains behind.
the shore line (beach) will disappear first but you will still be able to see the mountains. If the world was flat this would not happen.
3. Go to a tall mountain with a unobstructed view on a clear day. You can see the curve of the earth.
4. Go visit the International Space Station
1. North is at the center, South is the Antarctic ice ring and flying east or west will lead you in a circle like the Sun and Moon disks.
2. The shore goes out of view due to perspective and the limitations the eye/camera in your example.
3. Been there, done that; the horizon is a perfectly flat and level line that rises to eye/camera level no matter what the elevation.
4. You're joking right? Space is fake, there's no space, no satellites, no ball planets, no giant stars or galaxies, it's all a lie. Paintings and CGI, Hollywood movie magic, guys hanging from steel wires, vomit comets, underwater tanks, green screens and lots and lots of hairspray.
Black Holes??? HAHAHAH FUCK OFF!
Black holes? Who said anything about black holes? Why is provoking others more important to you than what is correct? Do you tell your friends and family you believe in this stuff?
Out of curiosity, what's your profession?
1. Yeah, black holes... you believe that shit LOL?
2. I provide evidence to back up my "provocative" claims of a Flat Earth, getting at the truth is always more important.
3. Of coarse I don't mention it to friends and family, HAHAHA.
4. I make dreams come true.