sentences:  The depot, a National Historic Landmark, was the railroad's largest station west of Council Bluffs, Iowa, and a major western example of Richardsonian Romanesque architecture.The museum, founded in 1993, interprets Cheyenne's early history and that of the construction of the Union Pacific Railroad.It hosts an annual Steam Train Excursion in July, and Depot Days, in which tours are offered of other railroad facilities.