Tim Maly takes us on a tour of New York City's landscapes of dredge, and explores how the city's past, present and future are shaped by technologies and processes of what he calls "the greatest unrecognized landscape architecture project in the world."

Steve Duncan — historian, photographer and explorer — reflects on wastewater infrastructure, underground rivers, and the thrills and urban lessons he's discovered beneath the surface of cities.

In our final video on complex urban systems, writer Elizabeth Royte offers a snapshot of the past, present and future of what happens to New Yorkers' trash once it leaves the curb.

"The city can be likened to a living microbe."

Juliette Spertus discusses her exhibit - which combines infrastructure, New York history and alternative urban futures - about Roosevelt Island's trash collection system.

What if sewers no longer overflowed when it rained? Kate Zidar talks about designing for stormwater management and why it is crucial to our health, our waterways and our city.

The West Harlem Piers Park is the last jigsaw piece in a now unbroken strip of publicly accessible waterfront running all the way up from Battery Park.

Artist and longtime creek explorer George Trakas shows us around the Nature Walk he designed at Newtown Creek.