What are national natural landmarks?

Famous quotes containing the words national, natural and/or landmarks:

    I would save the Union. I would save it the shortest way under the Constitution. The sooner the national authority can be restored; the nearer the Union will be “the Union as it was.”
    Abraham Lincoln (1809–1865)

    Your child should feel entitled to cry when you leave; crying is a natural thing for a child to do when she feels bad. The fact that your child cries when you go doesn’t mean she will never like day care. It just means she wants you to stay.
    Amy Laura Dombro (20th century)

    The lives of happy people are dense with their own doings—crowded, active, thick.... But the sorrowing are nomads, on a plain with few landmarks and no boundaries; sorrow’s horizons are vague and its demands are few.
    Larry McMurtry (b. 1936)