Park St. contains four active tracks.  It is 
		customary for travelers to step across the rails as necessary to move 
		between the platforms. 
		 
		
      Westbound, only one other station dates, like 
		Park St., to 1897: Boylston.  The subway turns under Bolyston St.  After the Copley 
		station, Heath St. (E) branch trains 
      split off in a wonderfully visible underground junction.  The three other branches 
      head on to the four-tracked Kenmore station, after which each  
      reaches the surface through its own portal.  |