
5. Like Secret Rooms? In Paris, There Are Entire Fake Buildings
Here on this list, we’ve talked a lot about secret rooms. But what about secret buildings? In Paris, there are entire buildings that are actually fake. For the most part, they are hiding ventilation shafts for the subway, which helps to make the city look just as beautiful and historic as it once did before the modern Metro was built. If you’re familiar with New York City, you already know that they don’t bother to hide the industrial aspects of how the city runs. But in Paris, they’re always trying to make things look pretty.

On a YouTube channel called The Tim Traveller, he shows several facades, or fake buildings in Paris. Some of them blend in very well, while others are rather obvious that they’re fake. One of my personal favorites is 29 rue Quincampoix, which has painted windows, rather than real ones. From a distance, this house might look real. But once you get up close, you’ll realize that it’s very obviously fake. This opitcal illusion is great, and proves how things can be hidden in plain sight.