Interesting fact:

You probably already knew this, but in the past, travel for leisure was only possible for the wealthiest classes! People have always travelled in order to learn new languages, to see how other cultures live, to take ideas down for art and architecture, or to simply taste different cuisines. Nowadays it is still not affordable for everybody, but flights are becoming so cheap that almost every day around 100 000 flights are flying through our skies! Impressive!