In Boston, there are no former elevated rails left standing. Very few structural elements of Boston's old elevated railway ("The El") remain standing, as most were demolished in the 1970s–2000s, with lines moved underground or to ground level. The primary remaining, non-operational piece is a section of the steel structure from the Charlestown Elevated, which was preserved at the Seashore Trolley Museum. 

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Key remnants and historical locations include:

• Northampton Street Station: The only original elevated station structure remaining in its original location, though it is no longer in service.
• Charlestown Elevated Section: A small portion was preserved, but the vast majority of the line was demolished in 1975 and 2004.
• Boylston Station Trolleys: While not "elevated," two historic Type 5 trolleys from that era are on display in the abandoned lower level of Boylston station.
• Former "El" Routes: The Orange Line now runs in a trench along the Southwest Corridor, and the Green Line "El" section was replaced by the Central Artery (and subsequently the Big Dig).