Unicycle on huge chimney in Targu Jiu (840' Tall Smoke Stack. INSANE!)

Youtube ^ | Aug 24, 2016 | Flaviu Cernescu

[Moltke]

Well, the distortion of the wide angle lens does create a sense of greater height. :-)

[Rebelbase]

Being one who sought out high places in my youth I can with certainty that the wide angle effect is accurate in conveying the immensity of the elevated event.

[Cvengr]

Of course, this doesn’t reflect the hazard at the location.

Generally these stacks emit Carbon Monoxide and heated air, which is why they are so high. To get it away from people on the ground. Even if shut down, their still is likely emissions from the solid chemistry going on down below.