This is the skeleton of Woolly Mammoth at Ripley's Believe It or Not, San Antonio.
It's gigantic! Can you imagine seeing a real mammoth?! Boy, I'll be terrified if I see a real one. I think I'll stick to watching the Ice Age movie...lol!
According to wikipedia, this animal is known from bones and frozen carcasses from northern North America and northern Eurasia with the best preserved carcasses in Siberia. They are perhaps the most well known species of mammoth.