Visitors view artworks during the exhibition "Reforestation of the Imagination" by artist Ginny Ruffner at the Renwick Gallery of the Smithsonian American Art Museum in Washington D.C., the United States, on Jan. 2, 2020. The installation consists of six islands, each featuring colorless glass sculptures of tree stumps. Viewers can access a gloriously complex and colorful alternative environment using AR's technological lens. (Xinhua/Liu Jie)