Rendering Denmark’s second-largest city in 52 colors, artist Olafur Eliasson has perched his permanent installation “Your Rainbow Panorama” on delicate columns 12 feet above the roof of the ARoS Art Museum, in Aarhus. Curved glass panels progress along the UFO-like structure. Visitors do, too, as they walk the 490-foot-long circular path, which opened in May. Each laminated pane of glass contains a color foil and was manufactured to withstand harsh weather. Recessed lighting in the walkway sets the building aglow at night. With Viking roots stretching back to the eighth century, Aarhus is a waterfront town and home to architectural gems that get great billing from the installation’s 360-degree views. Eliasson says that “Panorama” is a lighthouse: “The work becomes a compass in time and space.”