A waterfall is defined as a steep descent of water from a height. Whatever you call these falling waters, they delight the senses. This week’s quiz will see how much you know about waterfalls in the national parks. Answers are at the end. If we catch you peeking, you’ll be assigned plunge pool cleaning duties.

Bridges are among the most favored of all human structures. They serve us well, make a bold visual statement, and open the door to a storehouse of memories. Who doesn’t admire the elegant lines of a suspension bridge? Who can look at a covered bridge without thinking of a time when life was simpler and slower and friendlier? This week's quiz will find out how much you know about the bridges and bridge-related things in our national parks. Answers are at the end. No peeking.