Drone 10 buzzed high above Ariel-Foundation Park in Mount Vernon.
The 250-acre park was created on the former site of Pittsburgh Plate Glass factory, which shut down in 1976.
The main feature is this Rastin Observation Tower. It has a spiral staircase going about half-way up the 300-foot smokestack. If you want to climb all 280 stairs, park leaders say it's worth it.