The Hirshhorn Sculpture Garden in Washington, US is an outdoor sculpture gallery located in the National Mall in the heart of the US capital city. The garden was designed as a “museum without walls”, with its collection of modern sculptures displayed outdoors among the beautiful trees surrounding the museum building, which adds to its unique beauty. Its highlights include works by Henry Moore, Barbara Hepworth, Tony Smith, Claes Oldenburg, Robert Indiana, and many more. There are also gardens and courtyards where visitors can relax and admire the pieces from afar. The garden also offers visitors Interactive activities such as the Labyrinth Walk, where visitors can watch a live video projection in their path. This garden is definitely a must-visit for modern art lovers and those who appreciate outdoor galleries.