Wonder of the World is a play by American playwright David Lindsay-Abaire. This play was his second success as a playwright, the first play being Fuddy Meers which also premiered at the Manhattan Theatre Club. It opened there in the club in 2000 starring Sarah Jessica Parker as a wife named Cass who suddenly leaves her husband (after discovering his sexual fetish involving Barbie heads), and hops a bus to Niagara Falls in search of freedom, enlightenment and the meaning of life. This characters and tone of this play follows the pattern of Abaire's earlier writing, as he himself once said: "My plays tend to be peopled with outsiders in search of clarity."
Here is a synopsis of the story, from the play's own program: "Nothing will prepare you for the dirty little secret Cass discovers in her husband's sweater drawer. It is so shocking that our heroine has no choice but to flee to the honeymoon capital of the world in a frantic search for the life she thinks she missed out on. It's a wild ride over Niagara Falls in a barrel of laughs as Cass embarks on a journey of self-discovery that has her crossing paths with a blithely suicidal alcoholic, a lonely tour-boat captain, a pair of bickering private detectives and a strange caper involving a gargantuan jar of peanut butter, all of which pushes her perilously close to the water's edge."