Keep scrolling down for answers and more stats ...
1.
Countries in between the tropics
4.
Countries with a population density lower than the world average
5.
Capitals in the Danube
6.
Longest rivers in their respective continent
7.
Rivers in Germany
Ebro river is in Spain
8.
Brittish overseas territories
Guam belongs to the U.S.
9.
Countries on the US's Do Not Travel list
10.
Members of the European Union