Niagra Falls is intense. Nature at its most powerful and majestic. Really beautiful.
Downstream from the waterfalls are turbulent white-water rapids. Class-6, the most forceful in the world. Watching them is hypnotic.
Robin enjoyed the trip. She turned off her phone and immersed herself in the experience. The scariest part occurred in an underground cave leading to the main waterfall. As you approach the cave's opening, the roar of falling water grows louder and louder. Just before Robin and I exited the cave into a thunderous, wet unknown, she turned to me and said words I will never forget. She said, "You go first..."