According to the list on The Best Travelled Website
, Frank W. Grosse-Oetringhaus has seen the most WHS overall (940), when you combine it with our Community List.
Just today I stumbled upon his website, where he explains his approach on travel
Slide 49 and 50 zoom in on travelling to WHS, and 62-63 on involvement with UNESCO.
Although I am quite a planner myself, I think he's suffering from a serious case of travel obsessive–compulsive disorder. I do like his honesty though, he has spent 1.8 million EUR over the past 10 years getting where he is at now.