Diane Cook and Len Jenshel are two of America's foremost landscape photographers, exploring beauty, boundary and the control of nature for over 50 years. They were married in 1983, and began collaborating in 1991. 

In the fine arts, they have received numerous fellowships including the John Simon Guggenheim Memorial Fellowship, the National Endowment for the Arts, the Graham Foundation, three grants from the New York State Council on the Arts, the Design Trust for Public Space, and two grants from the National Geographic Society.

Their monographs include "Travels in the American West" (Smithsonian, 1992), "Hot Spots: America’s Volcanic Landscape" (Bulfinch Press, 1996), "Aquarium" (Aperture, 2003), and their latest book, "Wise Trees" (Abrams, 2017).

Their photographs have been exhibited in museums and galleries in over fifty one-person shows—including the Yokohama Museum in Japan, the Art Institute of Chicago, and the International Center of Photography in New York City, to name a few. Their work is represented in over one hundred museums and major collections worldwide. They have been represented in group shows at Museum of Modern Art, New York; Whitney Museum of American Art, New York; George Eastman House, Rochester; ICP, New York; National Museum, Smithsonian, Washington, DC; San Francisco Museum of Modern Art, San Francisco to name just a few.

In the magazine world, they were contributing photographers to National Geographic Magazine from 2006 to 2020, where they published over ten features. Their work has been published in numerous domestic and international publications, including The New Yorker, Harpers, The New York Times Magazine, Washington Post Magazine, Audubon, Fortune, Bloomberg, Forbes, National Geographic Traveler, Conde Nast Traveler, Travel & Leisure, Sophisticated Traveler, GEO, Departures, Esquire, and many others.  

Len and Diane reside in New York City.