Here's some really nice parks in this region:
Allegheny County Parks Department
Pittsburgh Zoo & PPG Aquarium
Boyce Park
North Park
Settler's Cabin Park
Nature Centers
Wagman Observatory - Star Parties, Deer Lakes
Oliver Miller Homestead - Children's Harvest Festival,  South Park
Map & Compass Hunt/Hike - Boyce Park Nature Center

Park info:

Special Events
Maps of the Parks


Phipps Conservatory: Year of Glass 2007
Pittsburgh Zoo & PPG Aquarium : Water's Edge exhibit
Botanic Garden of Western PA: groundbreaking started for new 452 acre aite

more stuff coming soon !!!