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.
Worldâs Most-Visited Tourist Attractions. For nearly 500 years, the emperors living within Beijingâs opulent Forbidden City dictated who could enter and leave. Well, the gates have opened, and tourists are pouring in to see it all for themselves. Attendance is up by 2.5 million since 2010.