The tower of the new Quito airfield.
The CVG control tower from the southwest side of the airport.
ATC that was constructed in 2011. Modeled on the sail of a Dhow - an Arabian sailing boat and at a height of 109m (358ft), it is the seventh tallest ATC in the world.
Lisbon Control Tower under some nice morning light. [1600px]
Control tower of Zurich airport [1400 px]