Thanks to Mrs. LufthansaFlyer for finding this in her reading of the internet today (she’s almost read the whole thing).
This DailyMail.co.uk article talks about Paro Airport in Bhutan. Apparently only 8 pilots on the planet are allowed to land at this airport. If you click on the article, there are 2 video clips that demonstrate why so few are allowed to actually land an aircraft there. Not sure if I’d want to be in the cabin for these flights!!!