The buildings are replicas of NYC landmarks, including Penn Station and Yankee Stadium, made from natural plant materials. The layout spreads on both sides of the aisle, and the two halves come together after about 200 feet. But many of the rail loops are separate and do not connect. On the “fringes” all the rolling stock consists of street cars. More conventional trains are in the middle. This is one of the largest exhibits I have ever seen (although in 2010, there was an exhibit near Dulles Airport in Virginia that was supposed to simulate 60 miles of track between two cities). The style of the exhibit resembles that in Washington DC at the US Botanical Garden near the Capitol, but it is much larger. There is a certain "Middle Earth" look to it all. In fact, I don't think there are any trains in "Tolkien" as I recall, but there are in some of the dominions of Clive Barker's "Imajica", so that could motivate further attractions, maybe in Las Vegas or in Orlando. But this exhibit must be New York City's answer to those two resort cities.
(It's hard to put these pictures in logical order.)