Hoover Dam, Nevada
The deep reservoir that stands atop the imposing Hoover Dam is some 660 feet from one side to the other. Until 2017, no-one who attempted to swim across had ever lived to tell the tale.
This is an undertaking that is fraught with danger. Thinking about taking it on? You’ll either end up in a police cell or a coffin.
In the ten-year period leading up to 2017, 275 people are known to have died here, on the Nevada-Arizona border. That a drunk British man managed to make it across that year was fortunate, his survival put down to the fact that nine of the dam’s 10 great hydroelectric turbines were not operational that day.
Had the Hoover Dam been working to full capacity, the chances are he would have been dragged beneath the surface and drowned, like so many before him. Still thinking about taking it on? The chances are you won’t be so lucky.