Beneath me, a sheet of mist stretches across two countries. It cloaks a densely forested valley which straddles the Thailand-Laos border. I cannot tell where one nation ends and the other begins when I am high atop Phu Chi Fa peak in Thailand's Chiang Rai province.
The reality is that in this mountainous region of South-east Asia, many things in life flow across national borders, whether culture or cuisine, religion or people.
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