"Newps" wrote in message
...
Last I heard the tallest man made structure was the TV antenna between
Fargo and Grand Forks at 2000 AGL. The vast majority of antennas are much
less than 1000.

Back in the 70's they built towers between Des Moines and Ames that were
2000 agl (2998msl). Looking at a Chicago sectional shows several antennae
around 1500-2000 agl in Jay's neighborhood.