Field guide No. 674

A white stone staircase climbs, curls over at the top and comes back down underneath itself in a single loop, standing alone in a blue room. It is excellent exercise and no help at all.

Impossible white stair loop

Goes nowhere, both ways.

A white stone staircase climbs, curls over at the top and comes back down underneath itself in a single loop, standing alone in a blue room. It is excellent exercise and no help at all.

Field noteEvery step on this loop is going up, including the ones on the way down.

Specimen
No. 674
Kind
Impossible (the round square kind)
Breaks
Physics
Where it doesn’t exist
A bright blue room, nothing else in it.
Nearest existing relative
A stone staircase.
Filed in Fresh slop as
Spaces

Also impossible, also breaking physics