SCIENCE: Periodic Table: Element, atomic number 50, symbol Sn?

Questions

There are sand dunes in Arcachon, ----------- that are 350 feet high.?

The highest point in Pennsylvania is lower than the lowest point in --------------?

There is a U.S. state capital that was named after a famous German. Bismarck, North Dakota, was named after ----------------------?

The islands of ------------- have no rivers or lakes. The inhabitants must use rain for water.?

The Italian city of -----------, where Shakespeare's lovers Romeo and Juliet lived, receives about 1,000 letters addressed to Juliet every Valentine's Day.?