C A T E G O R I E S

CANALS
::  D & H Canal
::  Erie Canal
::  Black River Canal
::  Schuylkill Canal
::  C & O Canal

RAILROADS
::  NYO & W Railway
::  D & H Gravity Railroad
::  D & H Railroad
::  D & E Railroad
::  DL & W Railroad
::  Erie Railway
::  PA Gravity Railroad
::  U & D Railroad
::  Laurel Line
::  Rutland Railroad
::  Other Railroads

REGIONAL
::  Upper Delaware
::  Northeastern PA
::  Catskills Mountains
::  North Country

OTHER
::  Coal & Collieries
::  Agriculture
::  Wood Products
::  Early Locomotives