Complex sentence: The "Old Put," as it was fondly called by commuters, once served 23 stations in Westchester, some of which still stand today including the Tudor-revival style Briarcliff Manor Station, now used as a public library.
Split into simpler sentences: The "Old Put," as it was fondly called by commuters, once served 23 stations in Westchester. One of those still standing today is the Tudor-revival style Briarcliff Manor Station, now used as a public library.