Grand Hope Park as National City Park
Livewire and Silver Banshee draw Supergirl and The Flash to the park where they are holding Cat Grant.
Source: IMDb
“Worlds Finest” Filming Locations
Supergirl episode “Worlds Finest” was filmed in Los Angeles in the United States of America.
Renaissance Tower as Tower by Park
The Flash follows Livewire to the top of a nearby building.
Mystery Mesa (Agua Dulce Ranch) as Field
After being rescued by Barry, he and Kara end up in a field outside the city where they introduce themselves.