Yep. I’m always amazed when I hear Italian students with no money saying they went to Paris or London for less than €10 with Ryanair. For those who don’t like planes, there are low-cost bus companies over the whole continent. Trains are more expensive, but a Paris-Milan is still only €40 if you book in advance.
The Instagram/TikTok feeds of 20-25 y/o are full of these lists of European cities you can visit in a weekend with a low budget.
See also: Erasmus.
