"The light left the water, casting a reflective sheen over the surface. A pure white hawk spiraled overhead. We entered the ninety-degree bend to the east that signaled the edge of Yaxchilan's protected area, and the approximate extent of the ancient city's ceremonial precinct. For the next three miles the river described an enormous omega, a nearly circular bend narrowly pinched at the neck. The peninsula's narrow neck and its prominent heights made it one of ancient Mesoamerica's most formidable defensive positions."
Christopher Shaw, Sacred Monkey River: A Canoe Trip with the Gods, p. 266