According to Atlas Obscura, the mirror maze on Pier 39 is so trippy an experience that some people would stumble down by just walking through it.
This is the title of a 17th Century French book whose illustrations instruct the artist about the basics of perspective. The very first steps to a good optical illusion.
Serbian photographer Nikola Olic lives in Dallas, Texas. His photographs testify to his mad love of buildings and cities. Their architectures are the occasion to get lost in the most derange perspectives.
Kokichi Sugihara teaches at the Meiji University in Tokyo and presented a superb optical illusion. Source: Nautilus.
After the photo, a video showing how you can write so big words hanging in the middle of a gymnasium. In The Gym from Doyle Partners on Vimeo.