Lonely man.

[Charles Gann]

Greetings fellow diallers,   This is a bit simple, but I thought it fun anyway.   From almost every point on earth, a person can leave their home, travel north a given distance, then travel east the same distance, and finally travel south the same distance to arrive at their home once again.  What is the angle of the gnomon of the horizontal dial belonging to the one person on Earth who cannot do this?   Charles