Field of Man-Sized Holes

It's a snug fit, but you squeeze yourself into the hole... The further you go, the darker it becomes. Eventually, you see a faint light grow brighter and reveal the other side. You step out unchanged, but now understand the intimate secrets of life.

You walk past all the holes, even the one carved perfectly in your shape... Why didn't I go inside? What would have happened? Have I been in that hole before? Who made these holes? What is... who... where?