Below are screenshots that may give a feeling of the range of things possible with MSTS.

Click on a picture for a larger view...

Central Railroad of New Jersey class PD-30 #2000Baldwin Locomotive Works Demonstrator 6000 Central Railroad of New Jersey Class FD43 A-B-A set 78-K-70General Motors Aerotrain Crossing Rockville Bridge on the Pennsylvania Railroad Lehigh & Atlantic Railroad "Susquehanna"Missouri Pacific #201AAllegheny Eastern Railway trainload of coal.      
Seaboard Air Line Railroad Locomotives Awaiting AssignmentTwo Central Railroad of New Jersey class FD-43 Locomotives at Jersey City Roundhouse in 1949 Lehigh Valley Railroad class BB4 #114Gulf Mobile & Ohio Railroad Passenger Train "The Gulf Coast Rebel"Seaboard Air Line Railroad Locomotive #2700 in 1963New York, New Haven & Hartford Railroad rainbow of color schemesSeaboard Air Line Railroad #2702 Lehigh Valley Railroad Tugboat "Wilkes Barre"New York Central Railroad A-B-A set 3200-3300-3201Central Railroad of New Jersey class PD-30 #2005 in 1952      
Erie Class P-1 "Triplex"Union Pacific Railroad #998Chicago, Milwaukee, St Paul & Pacific class EP-3 Passenger Locomotives Virginian Railway class EL2B #125Central Railroad of New Jersey Commuter Train