set foot in/on something

set foot in (some place)

To enter some location. It wasn't me—I've never set foot in that building before! If you ever set foot in my house again, I'll have you arrested.
See also: foot, set

set ˈfoot in/on something

enter or visit a place: Neil Armstrong was the first man to set foot on the moon, in July 1969.She’s been complaining from the moment she set foot in this hotel.
See also: foot, on, set, something