What are some examples of imagery in Macbeth?

There are many examples.

These include the imaginary dagger appearing, Banquo's ghost appearing and Lady Macbeth trying to get rid of the imaginary bloodstains.

There is a physicality to these examples. However examples of pure literary imagery include the links between Macbeth and the witches. For example "So fair and foul a day I have not seen " Macbeth, linked with "Fair is foul and foul is fair" the witches. Also "By the pricking of my thumbs something wicked this way comes" a witch's reference to the approach of Macbeth.