Out of steam and after realizing just how large an area the historic part covers, this weary traveler with his slight problem "down under" elects grabbing the local trolly to speed up the absorption of culture.

With only 18 hours to explore this city, it was obvious that without the handy trolly (and it's open roofed rear seat, a dream for photographers), then I could not have met my goal of at least passing and visual recording all the major points of interest.

Our trolley takes a not so brief stop at the aqueduct (these Mexico historical water sources simply fascinate me) while our guide decides to explain in detail (in Spanish) every aspect while reading each of the multiple commemorative statue-side narrative