Slits on a vertical line

Steel

15×15×360 (h)cm ×2pieces

How do I really grasp this secluded area surrounded by trees?
Like marking the passage of time I placed two square iron tubes with sculptured grooves and channels vertically into the ground.
The relationship in space between these two vertical axes gives birth to a sensation of a gap in time between here, and there.
Using minimal expression I have tried to create both an understanding and defamiliarization of space.