The vast majority of our waking hours are spent pondering things that are not in the least bit real like this. Just memes that only humans are aware of and believe in.

This airport is as real as a song, as santa, as a country, a law, the value of money, words.

In fact, an overwhelming majority of things that we generally perceive to be real are only things that exist in the shared consciousness of human beings. The only difference between santa and a law is just how strongly people believe in and how many people willingly support the latter.

But santa and laws are of the exact same category of made up ideas that we choose to believe in and that influence our group behaviour.

Some things do exist, like the combination of materials that make up buildings that we inhabit.

But their meaning and purpose and ownership and the reasons we enter them and the vast majority of what buildings mean to us aren't in the least bit real.

I wouldn't be in the least bit surprised to find out that ant and bee colonies also share their own memes that help structure their societies.