During the time of the winter solstice, the opening allows the rays of the sun to enter the passageway not once but twice per day. Every eight years, Venus also makes a similar 'double appearance' inside the mound.
During the time of the winter solstice, the opening allows the rays of the sun to enter the passageway not once but twice per day. Every eight years, Venus also makes a similar 'double appearance' inside the mound.