The pool at Letchworth is amazing. I've been there a bunch of times with my family - my dad used to go all the time growing up.
The pool is olympic size at least, plus a diving area. The water wasn't even chlorinated. A mini-
(e:terry) got us to do flips, because we were too scared. And I managed to swim across the pool in one breath, after trying forever.
Like everything else in state parks, the poolhouse and pool were super 60's. It had to have been built for thousands of people - is it because there used to be more families? The style is actually neat.

Ladders to peek over the wall

Hundreds and hundreds of lockers

Water wasting urinal

The mid century font

Simpler times when your food tasted of nicotine
Hahaha somehow that pic of your family judgy-staring-down paul and terry is hilarious. :P
Wow. if you all 6+ footers look so small in that chair... I wonder what I would have looked like!