23. Aldabra Giant Tortoise
Weighing in as much as up to over 275 kg (600 lb), the Aldabra Giant Tortoise is one of the largest and heaviest tortoises to exist. Yet, this amazing animal is famous for another extraordinary ability – it can live for about 200 years. Zookeepers in India believe their tortoise, who died in 2006, was actually 255 years old.