"I believe this is going to be one of the greatest Christian outreaches of this era in history"

Ham said the massive ark, based on the tale of a man who got an end-of-the-world warning from God about a massive flood, will stand as proof that the stories of the Bible are true. The group invited media and thousands of supporters for a preview Tuesday, the first glimpse inside the giant, mostly wood structure.

“People are going to come from all over the world,” Ham said to thousands of people in front of the ark.

The ark will open to the public Thursday and Ham’s group has estimated it will draw 2 million visitors in its first year, putting it on par with some of the big-ticket attractions in nearby Cincinnati.

The group says the ark is built based on dimensions in the Bible. Inside are museum-style exhibits: displays of Noah’s family along with rows of cages containing animal replicas, including dinosaurs.