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.
The United States alone has been a major tourist destination for Asians and Europeans. The Las Vegas Strip in Nevada, USA, tops the list of the most visited tourist attractions in the world with 39,668,221 visitors enjoying its casinos and theaters annually. Las Vegas has also been putting on more family-oriented attractions and shows to increase its visitor counts.