In Sao Paulo, million-dollar-condo high-rises stand shoulder-to-shoulder with low-flowing favelas, the rich live next to the poor, and one side of a street might feature well-tended gated homes, and the other a line of crumbling apartments.

But in Sao Paulo, as in most major cities around the world, there is another level of existence : the homeless, who can be seen lying on the sidewalks downtown next to the Cathedral, and all along the streets and in the parks in the center of town.

The day we arrived, I also spotted another habitat for the homeless, perhaps not so common in  cities elsewhere: tree houses, in the middle divider between the northbound and southbound lanes of the major road into the city center.

They’re built in banyan-like trees that have enormous roots dropping from the branches, and woven around the main trunk.

I’d guess this would be the perfect spot for a tree house, if you didn’t mind the exhaust fumes and the noise. Better than the streets, I’m thinking.