It looks like a huge disco floor placed right near the water of the Adriatic sea: this is the Greeting to the Sun, playing from dusk til dawn playful colourful lights generated by solar panels.
Opposites may attract in infinite ways. Symmetry, though, can only be achieved in 17 ways. And this exact number was proved by Mr. Evgraf Fedorov in 1891.
It is really amazing how Portuguese little towns, with their traditional small white houses and their nice, cozy, old-school vibes, can also be the scene of some stunning optical designs.