Indian Botanical Garden, Howrah, Kolkata is known as the largest banyan tree. It is also known as Acharya Jagadish Chandra Bose Indian Botanical Garden. The Great Banyan tree is over 250 years old. The present crown of the tree has circumference of 486m and the highest branch rises to 24.5m; it has at present 3772 aerial prop roots reaching down to the ground as a prop root.