The dénouement comprises events after the climax and the falling action (which should not be confused with dénouement).
A good example of dénouement is the final scene of Shakespeare’s comedy As You Like It: couples marry, an evildoer repents, two disguised characters are revealed for all to see, and a ruler is restored to power. Many of Shakespeare's dramas end in this manner, as do other classical plays. Indeed, dénouement is considered part of the classical dramatic structure.
The Penultimate Peril, the twelfth and second-last book in Lemony Snicket's Series of Unfortunate Events, heavily emphasizes dénouement as a plot point e.g. the character Dewey Denouement, the Hotel Denouement.
Some works have no dénouement, often because of a quick or surprise ending (e.g. Lord of the Flies).