Picture #21 is called 'Big Boabab' and lives in South America. It has a trunk circumference of 154 feet and can fit 60 people inside.
These trees can reach heights of 98 feet (as tall as an 8 story building) and hold 60,000 gallons of rainwater. They belong to the Succulent family.
I've bought a few of them to plant, but never had good luck with them. You almost have to have a perfect balance of wet and dry. Too wet and they rot or split...too dry and they wither away. I couldn't find that perfect balance.
Music is the Heartbeat of the World
Let's flip a coin; heads I win, tails you lose. Fair enough?