This is something I hear WAY too much from the flat earth camp:
"Show me the curvature!"
"Show me the curvature!
"Show me the curvature! You cant, all you have is fish-eye images or CGI cartoons from NASA!"
Oh, you want non-fish eye images of curvature? Here ya go!
Recently, me and Pew Review used the first image to match it up with this program here to see if the curvature matched up with a spherical earth with a radius of 4,000 miles.
It matched up PERFECTLY.