Robinson Park

Robinson Park is a park which is used by Poison Ivy and the Suicide Squad as a hideout.

Pre-Quakes
At some point in the last 6 years, Poison Ivy had found an old abandoned greenhouse and transformed it into her secret hideout. This lead to multiple sightings and rumors of a “plant lady” running around, but many Gothamites (including The Penguin) just thought her to be an urban legend. Fast forward to 2.5 months before the quakes, where Firefly was hired to “smoke out” Ivy, but ended up failing and torching half the park instead.

No man's land
The park became a messy place after the earthquake. The Penguin used the area for supply he got from private helicopters he owned. Ivy returned to it with the Suicide Squad after rescuing Amanda Waller, using her greenhouse as a base and hideout for the team. One day, while taking a walk, he stubbled upon this area and decided to explore it only to get trapped by traps Ivy set up. Unknown to him, Poison Ivy and her plants were there but Penguin left quickly.

Appearance
Robinsons Park has a rough and overgrown appearance, mostly because of Ivy's involvement. But it has multiple pathways running through it, a small forest-like section where Ivy’s greenhouse is located, and apparently enough room for a plane to hide secretly. Somehow.

Trivia

 * Ivy’s greenhouse is surrounded by a mix of chemicals, poisons and spores that will kill people if they stick around the greenhouse for longer than 10-15 minutes. A grizzly death can be a avoided if given an antidote by Ivy, or if one has a filtration mask on while wandering the greenhouse.
 * The greenhouse is meant to be a secret location. It can’t just be stumbled into unless it’s been agreed in advance.