The National Train Show or NTS, is held as part of the annual National Convention of the National Model Railroad Association. It is held in a different city each year. (Cincinnati, Ohio in 2005 and Philidelphia, Pennslyvania in 2006, for example) It consists of industry exhibitors (railfan and model railroad targeted) and club layout exhibitions. In 2005, the NTS had about 300,000 square feet of display space and about 20,000 paying visitors. The National Model Railroad Association or NMRA is a non-profit organization for those involved in the hobby or business of model railroading. ... Flag Seal Nickname: The Queen City Location Location in Hamilton County, Ohio Coordinates , Government Country State County United States Ohio Hamilton Mayor Mark L. Mallory (D) Geographical characteristics Area City 206. ... Independence Hall Philadelphia (sometimes referred to as Philly or the City of Brotherly Love) is the fifth most populous city in the United States and the most populous city in the state of Pennsylvania, occupying all of Philadelphia County. ...