The first photo is of the Long Meadow at Prospect Park, across the street from where we live. This is early morning off-leash hours and you see hundreds of dogs during these hours. We walk our Jack Russell (Bandy) here most mornings.
(click on photos to enlarge)
This next shot is another area of Prospect Park called the Lullwater.
The last photo is the Audubon Center at Prospect Park, also in the Lullwater area.