Steven Holl Architects has nestled "much-needed" performance spaces for the Kennedy Center in Washington DC under a grassy slope topped by three white-concrete pavilions. More
Intimate sleeping pods designed by Sleepbox have been installed at Dulles International Airport in Washington DC by architecture studio //3877. More
New York City firm Rockwell Group has inserted a grassy hill scattered with deckchairs and hammocks into the Great Hall of Washington DC's National Building Museum. More
Foster + Partners has collaborated with the Apple design team and architecture firm Beyer Blinder Belle to transform a neoclassical building in the US capital into a sleek retail space with a skylit atrium, where events are held to "entertain and inspire the local people". More
Rogers Stirk Harbour + Partners has completed its first cultural building in the US: the International Spy Museum in America's capital, which features an angled black volume, splayed red columns and a zig-zagged glass wall. More
Fluorescent cords attached to black rebar frames form this sculptural installation, which American firm Hou de Sousa has created for Washington DC. More
A mash-up of different styles is used to decorate this hotel in Washington DC, which New York firm INC Architecture and Design created inside an old church. More
A new hotel concept championing "progressive social change" has opened its first location in Washington DC, with spaces including a members' club, a wellness centre and three eateries designed by Gachot Studios, and Parts and Labor Design. More
A trio of elevated walkways links two wings of a glass-faced office building by SHoP Architects, which is located four blocks away from the White House. More
American architect Robert Gurney sought to open up views, and balance old and new, while renovating a four-storey historic dwelling in the Georgetown area of the US capital. More
Pentagram's New York office has updated the visual identity for America's Library of Congress in Washington DC, with a shape-shifting logo that resembles stacks of books and bookends on a shelf. More
New York design studio Snarkitecture is celebrating a decade of projects with an exhibition at the National Building Museum in Washington DC, which includes a white gabled house and a kidney-shaped ball pit. More
The impressive temporary structures built during the annual Burning Man festival are the subject of an exhibition in the US capital. More
Entrepreneur Elon Musk has been given written permission to begin digging a transportation tunnel in Washington DC, which could eventually facilitate a 29-minute journey between the capital and New York City. More
Architecture firm BIG has updated its plans for the revitalisation of the Smithsonian Institution campus in the US capital, after the initial designs sparked opposition. More
Trompe l'oeil illusions from the renaissance era influenced the design of this ceiling installation by American studio FreelandBuck, now on view in a Smithsonian museum in Washington DC. More
The controversial memorial to former US president Dwight D Eisenhower, designed by Frank Gehry, has finally begun construction in Washington DC after years of opposition. More
Chicago-based Studio Gang Architects has created a trio of cavernous chambers from stacked silver and magenta paper tubes inside the National Building Museum in Washington DC. More
Boston architecture firm NADAAA has remodelled a 1920s Washington DC residence by extending the attic, adding large windows, and using plywood sheets to arrange the internal layout. More
These new images by photographer Brad Feinknopf offer a tour through David Adjaye's Smithsonian National Museum of African American History and Culture, which opened last fall in Washington DC. More
