I was on an unofficial little stroll around Boerum Hill in Brooklyn when I noticed a piece of rail (close-up) visible in the pavement of Bergen Street just west of Bond Street. This must be a remnant of the streetcar line that once ran down Bergen Street. The trolleys are long gone, but this western half of the line lives on in the form of the B65 bus. (Most of the city's old streetcar lines were transformed into bus routes.)