Installation art is a form of art that involves the use of a space, either a constructed space or an existing one, to create an immersive environment that interacts with the viewer. World-famous installation artists include Yayoi Kusama, Christo and Jeanne-Claude, and Olafur Eliasson, among others. Their works are known for their innovative use of space, scale, and materials, and often involve interactive elements that encourage audience participation.