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.
In 2015, London held the top position of the world's most visited cities. In 2016, it was second only to Bangkok. London is the largest city and capital of the United Kingdom, home to many world class museums and tourist attractions including the London Eye, London Bridge, the British museum and more. In 2016, 19.88 million tourists paid a visit to London.