If you’ve ever walked across the Brooklyn Bridge, you know how crowded it can get. People from around the world come to New York City just to see the bridge -- but Justin Rivers, from Untapped Cities tours, explains it wasn’t always like that.

There was a period where people were terrified that the bridge was going to collapse. In fact, 12 people lost their lives back on May 30, 1883.

"You have to remember -- at that time women wore puffy dresses,” Rivers says. A woman tripped and caused everyone else to believe the bridge was collapsing. That day 12 people lost their lives.

If you want to learn more about historic events at the Brooklyn Bridge, Untapped Cities offers weekly tours.