Houlton, United States. Built on the boundary with Canada, the Aroostook Valley golf course is a truly international “country club.”

Muroc (historical), United States. The Armstrong Flight Research Center is NASA's primary atmospheric flight research and test facility. It is located on Edwards Air Force Base.

East Arlington (historical), United States. At 612 acres, and over 400,000 occupants, this is the nation's largest cemetery in terms of internments.

Baker Creek (historical), United States. Arkansas's only nuclear power plant is located in London, Arkansas, adjacent to Lake Dardanelle, from which it draws its cooling water.

Central City, United States. Now a national historic site, this mill operated from 1913 to 1943, processing ore brought via the 22,000 foot Argo Tunnel. At the time it was built, it was the largest mill of its type in the world.

Utuado, Puerto Rico. Arecibo Observatory is a unique radio telescope is a 1000 foot wide dish, with 38,700 perforated aluminum panels set in a suspended mesh of wires, a few feet above the ground over an old karst sinkhole.

Tip Top (historical), United States. Arcosanti is an entire city under construction near the town of Mayer, north of Phoenix, designed by the architect Paolo Soleri , a student of Frank Lloyd Wright.

Arco, United States. A small town in south eastern Idaho considered the "first city in the world to be lit by atomic power," which was provided (at least for an hour), by the nearby National Reactor Testing Station, on July 17, 1955.

Faries Park (historical), United States. At 1,125 acres, this is one of the largest of ADM's 200+ manufacturing facilities worldwide.

Wann (historical), United States. Where Arkansas, Oklahoma, and Missouri meet along Highway 43.