Located off the west coast of Scotland are the Outer Hebrides, an island chain where Finnish artists Pekka Niittyvirta and Timo Aho decided to install their piece, Lines. The installation is composed of lines of light wrapped around buildings or hovering on a grass field. At high tide, the lights turn on, illuminating the serene landscape, and marking the height of future sea-level rise on the low-lying archipelago.