Where is the longest visible line of sight on Earth from point A to point B?

Where is the longest visible line of sight on Earth from point A to point B? - Top view of assorted multicolored chicken eggs with bright handmade ornament in ceramic bowl for festive religious event at home

We've had some interesting questions on being able to see country A from B, and on visibility for miles in every direction.

For a 6 ft tall person, the horizon in a 'flat' area is meant to be about 5km. Obviously the higher you are, the further you can see, if nothing is obscuring your view.

So somewhere on Earth (point A) presumably, you can see all the way, unobscured to Point B, which is further away than any other two visible points on earth.

Where would this line be - that is, between which two points A and B?






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Where is the longest visible line of sight on Earth from point A to point B? - Old world map placed on wall
Where is the longest visible line of sight on Earth from point A to point B? - Closeup of political map of Australia with cities and regions with borders surrounded by seas and oceans placed on wall in sunny room
Where is the longest visible line of sight on Earth from point A to point B? - Thoughtful young bearded ethnic man with globe sitting at table in modern room





Point to Point Networking Line of Sight in Google Earth




Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Rahul Pandit, Nothing Ahead, Nothing Ahead, Andrea Piacquadio