Maybe not specifically what you are looking for, but as you drive down the road, look for clusters of light poles with no buildings...........some of
them are abandoned trailer parks with paved roads........ private property.......I think there's one West of Gandy Bridge on the South side of the road.......

Maybe another West of US19 on the South side of hwy60 in Clearwater.

Maybe on 301 East side, just South of Fowler Ave...close to the
"Ironworks" nightclub........where it used to be....possibly a Kart track....

There is another that I saw this week, but don't remember where.....
........the light poles are the give-aways....

Get some aviation maps from the FBO at an active airport.....they still show abandoned airports....some of them going back to the 40's and the Cuban Missle Crisis of the 60's........

...and for the record, my suspension "test track" is none of what I have mentioned.......... -Bob