John was proud of how he'd got lights installed inside the pool;
everyone else just waited for him to fill the pool back up, turn
them on, and jump in... and they'd wait from a safe distance.
I do have information about where this is: this was taken at the
Biltmore Estate in Asheville, NC – the largest privately owned house
in the US, built by George Washington Vanderbilt II between 1889 and 1895.