The Sun, part of a to-scale representation of the Solar System on the Riva in Zadar, Croatia. The display begins far back on the promenade that runs along the Adriatic Sea. Furthest from the Sun is Pluto, represented by a small disc, followed by Neptune, Uranus, Saturn, and Jupiter. After another stretch of empty space, Mars, Earth, and Venus appear as tiny specs in comparison to the massive sun. Each panel is also a solar cell that generates electricity for the city. The panels light up when stepped on, and the attraction is most popular at night, when the lights flash on and off as tourists dance around on the surface of the Sun.