There's a nearby military air force base where I live. I go over there to watch them load planes sometimes and I could watch for hours. The fact that they can fit planes into other planes is so nifty.
if you have a chance though, you need to visit the Airbus Headquarters in Toulouse, France, or the Boeing Headquarters in Everett, Washington. They are both amazing and they both offer tours to the public. Go and marvel at the sheer enormity of these awesome jumbo jets.
A cargo plane interior
A Beluga Airbus Interior
“The Airbus and Boeing Headquarters are cool places to tour.”