> This same argument could apply to airfields, but airfields "above" neighbouring geography are pretty rare. Take a look at Congonhas (https://en.wikipedia.org

> This same argument could apply to airfields, but airfields "above" neighbouring geography are pretty rare. Take a look at Congonhas (https://en.wikipedia.org/wiki/S%C3%A3o_Paulo%E2%80%93Congonhas_Airport https://en.wikipedia.org/wiki/S%C3%A3o_Paulo%E2%80%93Congonh...), it's a very busy airport right in the middle of a major city, and its runway sits higher than the roof of many of its adjacent buildings. As a passenger, landing there feels like you are going to land on top of the buildings until the last second. If a plane overruns the runway, it'll go downwards, cross a major road, and hit a building on the other side (yes, this has happened: https://en.wikipedia.org/wiki/TAM_Airlines_Flight_3054 https://en.wikipedia.org/wiki/TAM_Airlines_Flight_3054).