I have a little shadow that goes in and out with me,
And what can be the use of him is more than I can see.

-R. L. Stevenson, My Shadow

Adventure (Death Valley)

O Solitude! if I must with thee dwell,
Let it not be among the jumbled heap
Of murky buildings: climb with me the steep,-
Nature's observatory; ...

-Keats, Sonnet: O Solitude

Landmark (King's Canyon)

The strongest man in the world
is he who stands most alone.

-Ibsen,
An Enemy of the People, V

Rendezvous (Yosemite)

First Witch:
When shall we three meet again,
In thunder, lightening or in rain?
Second Witch:
When the hurlyburly's done,
When the battle's lost and won.

-Shakespeare, Macbeth, I, 1