Everything is still foreign, it just depends how you look at it.
I travel often to South Africa, Cape Town, and every time I meet new people they seems as foreign to me as if I had met a Scottish or Welsh in the UK.
They will have different habits, new ways of looking at world issues and I learn lots from just talking over a cup of coffee.
What you see on the movies is sometimes a idealized version of how natives interact and behave. For example, it is hard to imagine, at least for me ,that in Africa, in the 60's, tribes that had not seen a white person before. Not after over 500 years of colonisation, two world wards and many other expeditions to explore the continent.
In South America, sure, there are tribes that have not seen our "civilization" yet, but not in Africa.
You don't have to travel to meet foreign people, at least not in London.
The expedition did look amazing, and I would love to do something like that, but as I recently found out, there are numerous indigenous plants in the UK that would be suitable for a fish tank, so maybe I don't have to go as far as the far east to enjoy a expedition and seeing biotopes.
Maybe one day we can all organize one trip to maybe even southern spain, where it is hot, to see what plants lurk on those riversides.