The door of Bag End, Bilbo Baggins’ house, with the rune written by Gandalf to indicate the home of the “thief” for the Dwarves.
Gandalf:The Road goes ever on and on
Down from the door where it began.
Now far ahead the Road has gone,
And I must follow, if I can,
Pursuing it with eager feet,
Until it joins some larger way
Where many paths and errands meet.
And whither then? I cannot say.