The first illusion is a triangular shaped model, displayed to look like a cube frame. Visiting the place will reveal otherwise.
In the thumbnail of this place, three wheels can be seen. A stick connects to the other wheel. Impossibly, it shows the top wheel leaning on both of the wheels.
This illusion place was based off the Penrose Stairs, and shows a square staircase going up. Impossibly, it appears to continuously go up.
This illusion displays triangles and one appears to be inside the other, although it really isn't.
An endless river illusion. From the cover picture, it appears to be unending.