A lot of time in Niagara Falls as a tourist is spent waiting in long lines (line-ups to Canadians, queues to the English). Thousands of people are queued up, waiting to make use of 1 or 2 ordinary-sized elevators. Click any image to see them all larger

Oooops!… 😀
I had no idea the wait to view the Falls was like this. wow.
You can see the falls freely. The waits are for features like walking in tunnels behind the falls, riding a boat near the falls or traveling a walkway beside the raging Niagara.