Telefarm Towers Shoreview 360 degree aerial panorama at the Telefarm Towers in Shoreview, MN. These are 1436' transmission towers for Twin Cities television stations WCCO, KSTP, KARE, and many radio stations. The towers were replacements for a tower that collapsed in 1971, killing six workers on the tower and one on the ground.
This is the highest altitude quadcopter aerial I've done so far. (It's also higher than all but one of my helicopter panoramas!) Normally 400' is the max alititude for a drone, but the FAA allows flights up to 400' HIGHER than nearby structures.