Porta Square is located in the village of Nikia in Nisyros and is the main square of the village. It is a small and picturesque square that resembles a painting.
It was named "Porta" (Door), because from there all the roads of the village begin and all the doors of the settlement open.
It is famous for its elliptical shape and elaborate pebble floor, made in 1923, for which black and white stones were used to form interesting designs. It is the square that has been photographed more than any other island square in the country and rightly impresses every visitor.