building, grey, black, concrete, architecture, colour, capital, engineering, tourist, city, attraction, day, geometric, wanderlust, portrait, vertical, travel, reykjavik, landmark, tourism, opera house, indoor, color, iceland, national capital, force, profession, seat, traveler, technology, port, twenty-four hours, district, edifice, erect, application, european country, statement, urge, metropolis, urban area, urban center, working capital, gray, theater, center, opera, person