While this technically is not a true tree, to me it is the underwater equivalent. Coral formations like this take years upon years to create marvelous structures like this one. It was there long before we were born, but it is endangered due to the polution that we dump into our oceans. Once it is damaged, it will take hunderds of years to recover. Being able to dive in silence and seeing nothing but beautifull corals and the air pockets of my own breath, is my personal spot of nirwana.