One of the places I used to haunt was Balboa park in the valley.
Used to watch the single speed race bikes scream silently around the banked velodrome track.
I think it was built for the '64 Olympics practice.
At this same park, many who are into building remote control planes come often to fly.
Some beautiful planes out there.
If you've never seen a miniture B 52 with four engines go rumbling past you about 5 feet off the ground nice and slow like, you've missed something.
Loved to go there and eat lunch when I lived in so cal.