For silver the more important deposits commercially are such compounds as the minerals tetrahedrite and argentite (silver sulfide, Ag 2 S), which is usually associated with other sulfides such as those of lead and copper, as well as several other sulfides, some of which contain antimony as well.
France is the most visited European nation with 83.7 million international tourist arrivals in 2014. Established in the late 1700s, the Louvre Art Museum in Paris is one of the most frequented tourist sites in all of France. Europe is a fascinating continent, and it attracts millions of tourists annually.
Buenos Aires is the most visited city by international tourism in South America. Iguazu IguazÃº, falls one of The Seven Natural wonders of The. World summer (view in winter is snow and autumn in shimmering red and ocher leaves of) trees Of Nahuel Huapi, lake in the provinces Of neuquen NeuquÃ©n And. rio rÃ­o negro