Sunland Baobab of Limpopo, South Africa
"Big Baobab Tree (Adansonia digitata): This giant and ancient baobab at the Sunland Nursery, between Duiwelskloof and Ga-Kgapane, is the biggest specimen in the world. It has a circumference of 46,8m and carbon dating has determined its age at an astronomical 6000 years." from http://www.places.co.za/html/tzaneen.html
"When baobabs become a thousand years old, they begin to hollow inside. In the Big Baobab this has resulted in wonderful caverns and caves, where the world famous Baobab Tree Bar and Wine Cellar now amaze visitors. The tree bar can accommodate more than 60 people!"