15. Argentinosaurus
Since we told you about the largest carnivorous dinosaur to ever walk the planet, it’s only fair we tell you about the largest herbivore, the argentinosaurus. The dino was first discovered in Argentina, where it was quickly given its name. This amazing creature could reach up to 115 feet in length and over 100 tons, making this a true giant. To put its size into perspective, it would be like a beast the size of a dozen elephants roaming around.