probably Everrest
Mt. Fuji
I would say Princess Diana. For sure she was the most photographed in the UK.
September 11th 2001 is the most photographed event/ day in history while the swearing in of Barack Obama may be the most photographed moment. WW2 is the most photographed event in world history. Although it lasted a lot longer than one day.
Batmobile.
Hatta Fort
Yes
New York City.
No one has done research lately to update this answer but June Wilkinson was considered the most nude photographed woman in American during the 1950s and 1960s.
what is japan's most photographed site.
Diana
New York City, clearly.
The cast of Negating the Increasing Powerlessness of the Most Photographed Thing in America - 2010 includes: Tiana Hunter