Not a dumb question—Saddam Hussein was trying to do this. https://www.wikiwand.com/en/Project_Babylon https://www.wikiwand.com/en/Project_Babylon It's prohibit

Not a dumb question—Saddam Hussein was trying to do this. https://www.wikiwand.com/en/Project_Babylon https://www.wikiwand.com/en/Project_Babylon It's prohibitively expensive and logistically challenging to build on a mountain, and mountains on Earth don't go nearly as high as planes can.