Onceyougo,
The wave of sadness was a big surprise when it happened, but could have been anticipated and expected. You mentioned "memories" and I guess the sadness was the result of too much reminiscing. Started missing things that are gone. PeeWee and his family, other friends I had run with back in the old days, youth and youthful ways. Just the whole "you can't go home again" meme. And the place could use more consistent maintenance and management.
But the water, sun, and sky are still there, and some new interesting characters. Move forward, carry-on.