It's really interesting to read about all the restrictions in place to maintain the ecological sanctity of the place.

It makes you wonder what global tourism would look like if such care were taken everywhere with regard to natural and social heritage, restricting visitor numbers and impacts.

A very different picture - more like the 19th century, but with less theft of artefacts by aristocrats from richer nations. And the privilege of the few. But with a better-preserved world.

The practical balance has to lie somewhere in the middle, I imagine.