A teenager named David Wilson toted his Brownie Hawkeye camera all over Philadelphia in the late 1960s, photographing the city’s trolleys, trains and buses. In doing so, he inadvertently created a portrait not only of the city’s transit, but also its neighorhoods

The classic PTC cars running on Market Street in San Francisco aren’t the only SF-Philly transit connection–almost 130 years ago SF was the first city to install a cable car system, designed by Philadelphian Eleazer Gardner