painting of Sing Sing's long main wing, circa 1830

Sing Sing's women's wing (1837-1877)

Sing Sing's women's wing (1837-1877)

Sing Sing's women's wing (1837-1877)

Sing Sing's women's wing (1837-1877)

lines along railway parallel to the building

lines along railway parallel to the building

inmate construction teams

modern-day power lines on metal towers

modern-day power lines on metal towers

modern-day power lines on metal towers

road in Ossining, NY

power substation in New York, 1880s

power substation in New York, 1880s

power substation in New York, 1880s

power substation in New York, 1880s

Sing Sing's electric chair, nicknamed "Old Sparky" (electric chair was invented by Edison's co. to show how dangerous AC power could be, trying to promote his DC methods)

throwing the switch

modern-day train passing

modern-day train passing

modern-day train passing

modern-day train passing

electrical tower view from the side

power lines around guard tower

power lines around guard tower