The lift bridge in Duluth is celebrating its 120th birthday this year.

It helps manage the farthest inland port in the world.

"It's like the best, little daytrip from the cities, I think," said Hannah Foss, who was visiting Duluth.

Duluth has a way of attracting visitors from near and far, thanks in large part to its port.

"We've got ships from all over the world. We have two ships right now that are picking up grain and heading back across the ocean," said Aerial Lift Bridge Supervisor Dave Campbell.

And as they head for the high seas, they'll see a sight and hear a sound most ship captains have grown used to.

The aerial lift bridge has been granting safe passage for so long it's become part of the city's skyline. It's evolved over the years, but many of its original parts are still

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