For activists, scientists, and designers, images from the river's past hold the key to imagining its future.

Two hundred years of environmental change have meant both destruction and conservation of the most interesting river in America.

To secure New York City’s pipeline for local food, treat produce like tap water: Protect the source.

A new Monument to Gay and Transgender People merges strength and fragility, as well as communion and isolation, by the banks of the Hudson River.