Outside and inside the landmark Enid A. Haupt Conservatory at the New York Botanical Garden, the sounds of trains are in the air. You may as well call it Haupt Station with all the trains rolling through.

But that's not all. It may be the Holiday Train Show, but the other stars of the holiday tradition in the Bronx are the nearly 200 replicas of New York City landmarks, all made from plant parts by Kentucky-based Applied Imagination. Each replica takes hundreds of hours to make.

"These buildings, on average, 200 to 300 hours on the low end, over 1,000 sometimes, much more for the larger, more elaborate buildings. They are all done by hand by our team of artisans, and most of the materials we use we do forage from the forest floor," said Laura Busse Dolan, president and CEO of Applied Imagination.

Her dad, Paul, founded the company. 

Acorns, twigs, bark seeds and leaves are all used to create Yankee Stadium and the New York Public Library's main branch, plus iconic skyscrapers and bridges. It's all about paying tribute to the city's architecture of the past and present.

"We are coming upon the 60th anniversary of the Landmarks Law having passed, and I think this is a real celebration of the wonderful architecture of New York City and the stories that architecture tells, as well as what it continues to tell. We have a new landmark building in the show this year, which is Hearst Tower," said Jennifer Bernstein, CEO and president of the garden.

For some nighttime holiday fun, the garden is introducing "Holiday Train Nights." Some are designed for the 21 and over crowd, and others for families,  with music, food and more.

"Visitors will be able to pass through the train show, pass through the whole conservatory and see it all lit up at night like a snow globe, and then they will be able to visit the dining facilities and hear the live music, have treats, decorate gingerbread cookies," said Joanna Groarke, vice president for exhibitions and programming at the garden. 

It's all holidays all the time. As for the show, even if you have seen it before, they always figure out a way to make it seem like the first view.

"One of the things I love about this collection, which has been building for 33 years, is the arrangements make you see them in different ways," Busse Dolan said.

That makes it even more fun to track down that favorite model train or building. Plan your visit to the Holiday Train Show on the New York Botanical Garden's website.