If you've ever taken the water taxi from Downtown Disney to Port Orleans, you've passed the Tree House Villas.

Well, the original, older ones (like above) have been torn down. They had been heavily damaged during the hurricanes of 2004.
The ones you see now are newly constructed ( FAQ ).
They look remarkably like the older ones but have obviously new bases, which lessen their 'environmental footprint'.
I am so glad that Disney didn't just let these unique habitations just moulder away.
It almost (but not quite) makes up for the Bay Lake Monster.