This is one of the most interesting architectural landmarks in a city full of architectural landmarks. The East Building of the National Gallery of Art was designed by I.M. Pei and first opened to the public in 1978. In the second decade of the twenty first century, the museum underwent renovations and reopened to the public in 2016. The museum is home to the larges Calder mobile in the world. It a building awash in light and open spaces. Walk up and down staircases of marble. Take a seat by the trees in the sun atrium. Go to the roof, where you can take in a beautiful view of Pennsylvania Avenue and the Capitol and take a selfie with a giant blue rooster. And did I mention the Picassos, the Rothkos, the Dali by the elevator? A truly magnificent place to visit and explore. And photograph.