It is also the only Great Lake located entirely in the United States. Lake Ontario: Ontario is the Huron word for lake of shining water. This lake is the smallest of all the Great Lakes when measured in surface area (7,340 square miles / 18,960 square km).
The Swiss franc (CHF) is the only official currency in Switzerland (and in Liechtenstein). The franc is the only currency accepted everywhere. The Euro is the currency in the neighboring countries Germany, France, Italy and Austria, and in many other European countries. Nevertheless, you can pay with Euros in many shops, hotels, rail stations and gas stations in Switzerland. This is convenient if you're only in transit or only stay for one night.
On January 1, 1999 one of the largest steps toward European unification took place with the introduction of the euro as the official currency in eleven countries (Austria, Belgium, Finland, France, Germany, Ireland, Italy, Luxembourg, Netherlands, Portugal, and Spain).ther new EU member countries are working toward becoming part of the Eurozone. On the other hand, Andorra, Kosovo, Montenegro, Monaco, San Marino, and the Vatican City are not EU members but do officially use the euro as their currencies.