This is a clip from The Great Courses which I really love. It's intellectually stimulating. I love to learn.
Back in the 90's, I had a tourist helicopter flight over it, absolutely stunning.
It was amusing in the gift shop ; that my credit card from Yorkshire Bank was accepted, but the person in front of me couldn't pay with American Express.
Also interesting that it took thousands of years to create, while Meteor Crater up the road, took only a fraction of a second.
