You're the Nile,
You're the Tower of Pisa,
You're the smile
On the Mona Lisa.
Source: In Shorter Bartlett's Familiar Quotations, by John Bartlett, 1937, 1980, 1992.
-- Cole Porter, (Jun 9 1893-1964), US composer, lyricist; He is known for his sophisticated musicals, e.g., Kiss Me Kate, 1948 and his song Night and Day.