Railroad

New Portage Tunnel (Cambria County, Pennsylvania)
Southermost of three bores through Tunnel Hill, Gallitzin, PA
New York Central Freight House (Lorain County, Ohio)
New York Central Terminal (Erie County, New York)
New York, New Haven & Hartford Passenger Depot (Worcester County, Massachusetts)
Newark Broad Street Station (Essex County, New Jersey)
Newark Passenger Station (New Castle County, Delaware)
Newbern Illinois Central Depot (Dyer County, Tennessee)
Newington Junction Railroad Depot (Hartford County, Connecticut)
Newport Railroad Station (New Castle County, Delaware)
Niota Depot (McMinn County, Tennessee)
Niskayuna Railroad Station (Schenectady County, New York)
Norfolk & Western Depot (Pulaski County, Virginia)
Norfolk & Western Depot Marion, VA (Smyth County, Virginia)
Norfolk & Western Railway Depot (Smyth County, Virginia)
Norfolk And Western Railroad Depot (Lawrence County, Ohio)
Norfolk Southern Passenger Station (Pasquotank County, North Carolina)
Norfolk Southern Roundhouse (Buncombe County, North Carolina)
North Abington Depot (Plymouth County, Massachusetts)
North Bennington Depot (Bennington County, Vermont)
North Broad Street Station, Reading Company (Philadelphia County, Pennsylvania)
North Conway Depot and Railroad Yard (Carroll County, New Hampshire)
North Creek Railroad Station Complex (Warren County, New York)
North Easton Railroad Station (Bristol County, Massachusetts)
North Pemberton Railroad Station (Burlington County, New Jersey)
Northbound and Southbound Stations (Attleboro) (Bristol County, Massachusetts)
Northern Pacific Depot (Pine County, Minnesota)
Northern Pacific Depot (Pine County, Minnesota)
Northern Pacific Depot (Aitkin County, Minnesota)
Northern Pacific Depot (Pope County, Minnesota)
Northern Pacific Depot and Freight House (Grand Forks County, North Dakota)
Northern Pacific Passenger Depot (Becker County, Minnesota)
Northern Pacific Passenger Depot (Wadena County, Minnesota)
Northern Pacific Railroad Depot (Missoula County, Montana)
Northern Pacific Railway Depot (Cass County, North Dakota)
Northern Pacific Railway Depot (Shoshone County, Idaho)
Northern Pacific Railway Depot (Burleigh County, North Dakota)
Northern Pacific Railway Depot (Morrison County, Minnesota)
Northern Pacific Railway Passenger Depot (Walla Walla County, Washington)
Northern Pacific Railway Passenger Depot (Kittitas County, Washington)
Northland (St. Louis County, Minnesota)
O & W Railroad Station at Port Ben (Ulster County, New York)
Oak Hill Railroad Depot (Fayette County, West Virginia)
Oakfield Station (Aroostook County, Maine)
Oakton Trolley Station (Fairfax County, Virginia)
Ocala Union Station (Marion County, Florida)
Ocean City 34th Street Station (Cape May County, New Jersey)
Ocean City Tenth Street Station (Cape May County, New Jersey)
Oconomowoc Depot (Waukesha County, Wisconsin)
Ogden Union Station (Weber County, Utah)
Old A.C.L. Union Depot (Putnam County, Florida)
Old Amherst Freight Depot (Lorain County, Ohio)
Old Colony Railroad Station (Bristol County, Massachusetts)
Old Depot Restaraunt and Lounge (Claiborne County, Mississippi)
Old Fort Railroad Depot (McDowell County, North Carolina)
Southern Railway train depot in Old Fort, NC
Old Gainesville Depot (Alachua County, Florida)
Old L & N Station (Nelson County, Kentucky)
Old Port (Cumberland County, Maine)
Old Railroad Station (Lorain County, Ohio)
Old Santa Fe Railroad Depot (Franklin County, Kansas)
Old Sante Fe Depot (Noble County, Oklahoma)
Sante Fe Railroad-style Depot
Old Smokey (Rusk County, Wisconsin)
2-8-2 Mikado locomotive, a class L-2 built by Alco in 1920
Old Union Depot (Leavenworth County, Kansas)
Olean Railroad Depot (Miller County, Missouri)
Olive Hill C & O Depot (Carter County, Kentucky)
Oliver Springs Southern Railroad Depot (Anderson County, Tennessee)
Olmsted Depot (Pulaski County, Illinois)
Olmsted Falls Depot (Cuyahoga County, Ohio)
Omaha Depot (Rock County, Minnesota)
Opa-Locka Railroad Station (Miami-Dade County, Florida)
Oradell Station (Bergen County, New Jersey)
Orange Cove Santa Fe Railway Depot (Fresno County, California)
Orange Station (Essex County, New Jersey)
Oregon Short Line Depot (Box Elder County, Utah)
Oregon Short Line Passenger Depot (Beaverhead County, Montana)
Oregon Short Line Railroad Depot (Malheur County, Oregon)
Orfordville Depot (Rock County, Wisconsin)
Osage City Railroad Depot (Cole County, Missouri)
Osage City Santa Fe Depot (Osage County, Kansas)
Outlook Depot (Sheridan County, Montana)
Outville Depot (Licking County, Ohio)
Owings Railroad Depot (Laurens County, South Carolina)
Railroad Depot in the unincorporated town of Owings, SC
Pacific Coast Railway Company Grain Warehouse (San Luis Obispo County, California)
Pacific Electric Railway Company Depot (Orange County, California)
Palatine Bridge Freight House (Montgomery County, New York)
Palmer Depot (Matanuska-Susitna Borough, Alaska)
Palo Alto Southern Pacific Railroad Depot (Santa Clara County, California)
Paris Memphis and Gulf Depot (Howard County, Arkansas)
Paris Railroad Depot (Bourbon County, Kentucky)
Park Ridge Station (Bergen County, New Jersey)
Park Street Railroad Station (Middlesex County, Massachusetts)
Pascagoula Street Railroad and Power Company (Jackson County, Mississippi)
Passenger and Baggage Car No. 4639 (Lancaster County, Pennsylvania)
Passenger Coach No. 3556 (Lancaster County, Pennsylvania)
Passenger Day Coach No. 8177 (Lancaster County, Pennsylvania)
Passenger Locomotive No. 1223 (Lancaster County, Pennsylvania)
Passenger Locomotive No. 1737 (Lancaster County, Pennsylvania)
Passenger Locomotive No. 460 (Lancaster County, Pennsylvania)
Passenger Locomotive No. 7002 (Lancaster County, Pennsylvania)
Patrick Depot (Chesterfield County, South Carolina)
Pawtucket-Central Falls Railroad Station (Providence County, Rhode Island)
Peabody Tavern (Oxford County, Maine)
Peachtree Southern Railway Station (Fulton County, Georgia)
Peekskill Freight Depot (Westchester County, New York)
Penn Central Railway Station (Calhoun County, Michigan)
Penn Central Station (Wayne County, Michigan)
Pennington Railroad Station (Mercer County, New Jersey)
Pennsboro B&O Depot (Ritchie County, West Virginia)
Pennslyvania Railroad Station (Allen County, Indiana)
Pennsylvania Depot (Knox County, Ohio)
Pennsylvania Railroad Caboose (Warren County, Ohio)
Preserve Pennsylvania Railroad Caboose sitting in Morrow Ohio
Pennsylvania Railroad Depot and Caboose (Clark County, Indiana)
Pennyslvania Railroad Depot and Caboose Preserved in place
Pennsylvania Railroad Freight Building (Philadelphia County, Pennsylvania)
Pennsylvania Railroad Freight Station (Washington County, Pennsylvania)
Pennsylvania Railroad Office Building (Philadelphia County, Pennsylvania)
Pennsylvania Railroad Passenger Station (Washington County, Pennsylvania)
Pennsylvania Railroad Station (Allegheny County, Pennsylvania)
Pennsylvania Railroad Station (Lake County, Indiana)
Pennsylvania Railroad Station (Chautauqua County, New York)
Pennsylvania Railroad Station (Wayne County, Indiana)
Pennsylvania Railroad Station--Latrobe (Westmoreland County, Pennsylvania)
Pennsylvania Railroad Station-Wilkinsburg (Allegheny County, Pennsylvania)
Pennsylvania Railway Ore Dock (Cuyahoga County, Ohio)
Pennsylvania Railway Station (Licking County, Ohio)
Pennsylvania Station (Baltimore, Maryland)
Pennsylvania Station (Essex County, New Jersey)
Pepin Depot Museum (Pepin County, Wisconsin)
Original Pepin depot
Pere Marquette Railway Belding Depot (Ionia County, Michigan)
Pere Marquette Railway Locomotive #1223 (Ottawa County, Michigan)
Perris Depot (Riverside County, California)
Perth Amboy Station (Middlesex County, New Jersey)
Petaluma and Santa Rosa Railway Powerhouse (Sonoma County, California)
Philippi B & O Railroad Station (Barbour County, West Virginia)
Philipse Manor Railroad Station (Westchester County, New York)
Phoenicia Railroad Station (Ulster County, New York)
Pickens Railroad (Pickens County, South Carolina)
Historic South Carolina shortline now abandoned
Pickerington Depot (Fairfield County, Ohio)
Piermont Railroad Station (Rockland County, New York)
Pinewood Depot (Sumter County, South Carolina)
Pittsburgh & Lake Erie Railroad Station (Allegheny County, Pennsylvania)
Pittsburgh and Lake Erie Railroad Complex (Allegheny County, Pennsylvania)
Pittsfield Railroad Station (Somerset County, Maine)
Plainfield Station (Union County, New Jersey)
Plaistow Carhouse (Rockingham County, New Hampshire)
Plaza Substation (Los Angeles County, California)
Pleasant Lake Depot (Steuben County, Indiana)
Plymouth Depots (Sheboygan County, Wisconsin)
Pair of adjacent railroad depots built by competing lines
Pocahontas Depot (Randolph County, Arkansas)
Point Defiance Streetcar Station (Pierce County, Washington)
Point of Rocks Railroad Station (Frederick County, Maryland)
Point of Rocks Stage Station (Sweetwater County, Wyoming)
Poland Railroad Station (Androscoggin County, Maine)
Polkton Rail Depot (Anson County, North Carolina)
Pompton Plains Railroad Station (Morris County, New Jersey)
Portland Railroad Company Substation (Cumberland County, Maine)
Potter Place Railroad Station (Merrimack County, New Hampshire)
Potter Section House (Anchorage, Alaska)
Poughkeepsie Railroad Station (Dutchess County, New York)
President Street Station (Baltimore, Maryland)