Best feeling ever!
Yes, and I think, according to what they are telling/showing us in film and entertainment (Godzilla: King of the Monsters, Attack on Titan, Pacific Rim, etc) that either these creatures exist somewhere else, or they are trying to revive or replicate these creatures.
Past few days I think
Here are a few I picked up in my travels
I always remembered these stories from Disney that Paul Bunyan and Babe the blue ox made the rocky mountains