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.
Nearly 50 million people visit the United States from other countries every year. Most of them are tourists or businesspeople, and most come from Canada and Europe. Interestingly, in recent years more Europeans visited the United States than the number of Americans who visited Europe. As of 2008, the most visited tourist attraction in the US is Times Square in Manhattan, New York City which attracts about 35 million visitors yearly.