No wrong answers (but some answers are more wrong than others).
I'll start: Katy Trail is the best "park" in DFW. It's not technically a park, it's a trail. But the community, the views, the accessibility, and the fact that it connects Uptown to the American Airlines Center to the Cedars — it's the spine of Dallas outdoor life.
Defend your hot take. Bring evidence if you have it. Bring passion if you don't.