Madagascar

why Madagascar? Can be anywhere in Africa, in Australia or even in an botanical garden somewhere else.

Has to be Madagascar - Baobabs are indigenous. (Unless it's been transplanted).

Boab tree in Northern Western Australia

It's apparently a Madagascan Baobab tree. So yes, Madagascar

It's a Boabab tree in Madagascar - see external link

Hawaii, Botanical gardens

Madagascar?

guessing somewhere in Northern Australia or Africa... somehwere ? looks to be a Boab Tree