United States

Seen from satellite, the streets and islands of San Francisco Bay form an enneagon whose highest point is the Transamerica Pyramid.

The main locations of the September 11, 2001 attacks are arranged along a perfectly straight axis, from the Logan International Airport in Boston to the WTC twin towers and the center of the Pentagon building. This alignment extends to Chapultepec Park in Mexico City.

An exercise consisting of locating places illustrated more than thirty years earlier using Google Street View.