>sorry anon, but the earth is flat, not hollow
>*pic related clearly shows a flat horizon as seen from an Indian beach
You clearly failed trigonometry and calculus. A sufficiently short segment of the circumference of any circle can be approximated as a straight line. That's what you're seeing in that photo; a very short segment of the circumference of the Earth, which visually approximates a straight line. Go back to math class; you can prove this principle to yourself as many times as needed until you grasp the concept.