In each group, name any answer which matches the first category to reveal the second category, then name any answer which applies to both categories to reveal a third, and so on.
Another nice addition to the series. I somehow forgot that you can also guess countries for the last one. It would be amazing if the same clues all led to a country and its capital - it's pretty close on this one!
Maximum elevation in Czech Republic is Mount Sněžka, with an elevation of 5,256 feet (1,602 metres). This is less than the 2,000 metres specified in the quiz.
(nomination)