The visitor center is an unusual space. Designed by Nuno Ribeiro Lopes that the restructuring and redesign on an old building on the island of Graciosa, Portugal. E ‘in this modern building that travelers can get information on the sulfur cave in the area. This is truly spectacular glass structure, is built over the water and is surrounded by natural craters. E ‘on two levels, the ground floor seems buried in the ground, but from the top floor you can enjoy a wonderful panorama. The key to the reconstruction of this area was the feature, a modern and innovative, but not too flashy. I believe that from the point of vsta a visitor has a great effect and is a particularly attractive building.