The Rooftop is a location in Problem Sleuth. It is located in the Imaginary City Streets.
Quite simply, this area is the roof of a building that Team Sleuth has never explored. It can be accessed in three ways: from a fire escape outside the Window of Ace Dick's office, from a peanut brittle Dumbwaiter that can be lowered down to the streets below, or from a skylight that leads into Pickle Inspector's office. It should be noted that only objects have passed through the skylight, as it is too narrow to accommodate people.