airports and buildigns

https://en.wikipedia.org/wiki/Hong_Kong_International_Airport

https://upload.wikimedia.org/wikipedia/commons/9/92/A_bird%27s_eye_view_of_Hong_Kong_International_Airport.JPG , https://en.wikipedia.org/wiki/Chek_Lap_Kok

https://en.wikipedia.org/wiki/S%C3%A3o_Paulo%E2%80%93Congonhas_Airport#/media/File:Sao_Paulo_Congonhas_2.jpg

https://en.wikipedia.org/wiki/S%C3%A3o_Paulo%E2%80%93Congonhas_Airport#Accidents_and_incidents


https://en.wikipedia.org/wiki/List_of_the_busiest_airports_in_Europe#2018_statistics