Nuevo. Currently under reform, there is still teaching going on. On the underground parking just below the extension of the Conservatory, archaeological remains of the 18th century Contravalación line were found and are now displayed nearby. Plans for introducing soon the area of professional Opera Singing were put forward in December 2006 by famous International Opera soprano Singer Montserrat Caballé. Museums Museo Cruz Herrera Museum of the Isthmus . Located at the former Military Command of the city. Municipal Historical Museum. It stores files documenting the city since 1887. Museo Taurino—Bullfighting Museum. It stores a large collection of bullfighting posters, costumes, herds, stamps, photographs of bullfighters, and so on. Composed of four rooms and a chapel, Manolete hall, El Gordito hall, Antonio Duarte "Pota" lounge, El Marinero hall and the Frascuelo hall. With thousands of photographs, bullfight posters, marking irons, torero costumes, trophies, capes, flags, stocks, etc.. With over 50 years of history, it can be considered one of the most important ones in the country. Founder: José Cabrera Duarte, a great fan of bullfighting, and a keen collector of all kinds. Geography Beaches La Línea has of beaches, named Playa de Levante, Playa de La Atunara, La Alcaidesa, Playa de La Hacienda, Playa de Poniente, Playa de Santa Bárbara, El Burgo Sobrevela, Portichuelos, Playa de Torrenueva, some of which are awarded each year a Blue Flag beach award by the Coastal European Authorities. In 2007, the beaches of La Alcaidesa and Sobrevela obtained this recognition. Environment In May 2014 a report by the World Health Organization showed that La Línea had the worst air quality in Spain. The report concentrated on PM10 and PM2.5 Pollutants in the air, which could only have come from the nearby Gibraltar-San Roque Refinery , in the 2016 report by the World Health Organization, La Línea was the third worst place in Spain in terms of air quality. Climate La Línea de la Concepción has a subtropical Hot-summer Mediterranean climate (Köppen: Csa) with moderately warm winters and very warm summers. The summer is the driest season, while the winter is the wettest season, followed closely by the autumn. The average annual temperature is 18.6 °C. The high temperatures during winter range normally from , while the lows from . During summer, the high temperatures range normally from , while the lows from . Large fluctuation between the highs and the lows is very rare,