This Banyan tree was preserved during the construction of Pacific Place in Hong Kong. The tree is believed to have been planted circa 1870 as part of the British Military Forces Victoria Barracks which occupied this site until 1979.
Preservation of this tree required the construction of a cylindrical structure with a diameter of 18 metres and depth of 10 metres in order to contain the roots. The total cost was HK$25,890,227. This is believed to be the most expensively preserved tree in the world.
(Quoted from the plaque identifying the tree).