This art installation is currently on display in Tokyo. The piece, created by a Japanese art collective called TeamLab, is described on their website: 

"When a viewer gets close to this flower-filled space, the flowers close to the viewer rise upwards all at once, creating a hemispherical space with the viewer at its center. In other words, although the whole space is filled with flowers, a hemispherical space is constantly being created with the viewer at its center and the viewer is free to move around wherever they want. If many viewers get close to one another, the dome spaces link up to form one single space."