How High Do You Have To Be To See The Curvature of The Earth 360/VR

It's well understood that from the surface of the Earth the curvature of the planet is not readily visible, but, as you travel higher the shape of the world becomes apparent to a casual glance. So I wanted to actually quantify this in an visual form using Youtube's 360 Video feature, it's obviously best experienced through a VR headset, or a 'Cardboard' style viewer, but you can also use the web browser if you just want to appreciate the visuals. Music 'Future Memory' by Test Shot Starfish