DALLAS – Dealey Plaza is a depression. It is a shallow basin on the western edge of downtown, framed by concrete structures called pergolas and peristyles that were built in the late 1930s by the Works Progress Administration. Designed as a gateway to the city, the plaza is more of an ode to the automobile because the broad lawn is sliced by three converging streets: Elm, Main and Commerce. They slope from east to west and meet beneath a rail line in what is known as the triple underpass.
That is where President and Mrs. Kennedy were headed, on Elm, when the ghastly thing happened.