Order by maximum depth, shallowest first. You place all 45 cards in the right order, one at a time. You start with three lives, and ten right in a row wins a lost one back.
How deep does it go? Each card is a lake, with the country or region printed under it, and you're ranking them by maximum depth in meters, shallowest first. You begin with one lake on the line and its depth showing. Place each new card above or below the lakes already down by picking a gap. If you're right, its depth is revealed; if you're wrong, it still moves to its true spot and you lose one of your three lives.
Size and depth have little to do with each other: some enormous lakes are surprisingly shallow, while narrow mountain lakes plunge very deep. Lakes carved by glaciers and those sitting in old rift valleys tend to be the deepest. The middle of the deck is crowded with lakes of similar depth, and fame doesn't help much there, so think about how each lake was formed.
This deck has been played 13 times. An average run places 2.7 cards, and 47% of all placements land in the right spot. Nobody has placed every card yet.
Here are 28 of the 45 cards you might be dealt, with 17 more in the deck. Their values stay hidden until you place them.