The Ellipse, sometimes referred to as President's Park South, is a 52-acre park south of the White House fence and north of Constitution Avenue and the National Mall in Washington, D.C., US. The Ellipse is also the name of the five-furlong circumference street within the park. The entire park, which features monuments, is open to the public and is part of President's Park. The Ellipse is the location for many annual events. From a mathematical point of view, the Ellipse is truly an ellipse.