Hundreds of thousands of people have attended since public tours started August 1, giving a big boost to the downtown area.
"I thought it was really beautiful," said 10-year-old Ryan Bartholomew. He and his family visited the open house Friday afternoon.
"I'm actually glad that I got to go in there because I won't be able to go in there until I'm a lot older," he said.
"I think I was impressed by the size of it," added Ryan's grandmother, LeeAnn Nelson. "I didn't realize it was going to be quite so big."