Natalie
Google
We visited the Power Station in the evening during our Niagara Falls trip, and it was a highlight of our trip. We started with the museum portion and used the audio tour. The audio tour is "self-paced," which is great, but the Power Station is huge. If you are a history buff, you could easily spend 2+ hours just in the main hall—definitely leave yourself plenty of time if you plan on hitting every stop, as it's very detailed.
After the main hall, we took the elevator down to the Tunnel. The tunnel is about 2,200 feet long (roughly 0.7 km). It's flat and paved, but it is a long walk there and back, so wear comfortable shoes. We timed it perfectly: we walked out during the daytime experience, but on our way back, it had transitioned into the night experience with synchronized lights and music.
At the very end of the tunnel, there is an observation platform right at the edge of the river. The platform at the end puts you at the very bottom of the falls, looking up. It’s a much more powerful feeling than looking down from the sidewalk above. They provide free ponchos, which you will definitely need because of the mist from the Horseshoe Falls—an amazing perspective of the falls that most people miss!