- [first lines]
- Narrator: There is a place where, every second, more than half a million gallons of water tumbles over towering cliffs three thousand feet wide. A place where it free-falls a spectacular one hundred and seventy feet before plunging into a seething cauldron far below. These thundering waters reflect Nature at its most powerful and most destructive, and its most magical and alluring. This is Niagara Falls. As one of the natural wonders, our love affair with Niagara has spanned the past three hundred years. Once, the Falls' foaming waters were feared and revered. Today, they have been tamed, and we enjoy them from as many vantage points as we can. Yet some are ready to risk death to experience these waters in all their raw power.
- [re the Niagara River]
- Narrator: Flowing northwards, it carries the entire content of four lakes. In terms of volume of water carried per mile, this is the largest river on the planet. After 22 miles, this massive volume of water plunges over Niagara Falls.
- [last lines]
- Narrator: Over the course of the Earth's history, waterfalls as grand as Niagara have come and gone without any human witnesses. So, in geological terms, our love affair with Niagara has been as fleeting as it has been intense. And today, the future of this relationship rests firmly in our own hands.