It was built on private land but apparently is now on Maryland State-owned land as a permanent monument. There have been many humanists and atheists who have readily acknowledged that the Bible has wise and valuable sayings. The American Humanists might be wise to consider this one; "Hear now this, O foolish people, and without understanding; which have eyes, and see not; which have ears, and hear not" Jeremiah 5:21
That’s a very pretty Cross monument. Like the design of it.