There is a skewed square is in the middle. (The image is Copyright A. Kitaoka)

There seems to narrow at the tips

These lines are not bent?

They are gonna get really tired!

They are not expanding. (The image is Copyright A. Kitaoka)

They are not getting bigger. (The image is Copyright A. Kitaoka)

They are not rotating. (The image is Copyright A. Kitaoka)

They are not rotating. (The image is Copyright A. Kitaoka)

They are not rotating. (The image is Copyright A. Kitaoka)

They don't get bigger. (The image is Copyright A. Kitaoka)

Upside-down lobby.

Vertical lines are parellel to each other. (The image is Copyright A. Kitaoka)

Vertical lines are straight and parellel to each other. (The image is Copyright A. Kitaoka)

What do you see?

Where does the train travel?

Which direction is he looking? (The image is Copyright Archimedes-Lab)

Which perpendicular line is bigger? Yes, they

Who is inside, who is outside?

You are being watched.

Young and old.