Bent Pyramid

The Bent Pyramid is an ancient Egyptian pyramid located at the royal necropolis of Dahshur, approximately 40 kilometres south of Cairo, built under the Old Kingdom Pharaoh Sneferu. A unique example of early pyramid development in Egypt, this was the second pyramid built by Sneferu.

The Bent Pyramid rises from the desert at a 54-degree inclination, but the top section is built at the shallower angle of 43 degrees, lending the pyramid a visibly "bent" appearance.

Source: Wikipedia