Crafted Cave Yoni

The Womb Cave in Nenkovo, Bulgaria is a human-helped cave formation where the walls always have water seeping through them.

At the far end of the cave is a human-constructed altar, and when the sun hits it's zenith, the light fills the cave via a hole in the ceiling and projects a sunlight phallus that grows longer as the sun sinks.

Certain months of the year, the sunlight shame is long enough to reach the altar, symbolizing fertility.