Just outside my hometown there is a little bit special natural phenomenon. There is a lake, that sometimes just dries up. The apparent reason why is that you have a cave system that goes beneath the surface, and the soil acts like a sponge that plugs he caves, and keeps the lake “alive”. But when it gets dry over long periods of time, the sponge effect stops, and the entire lake disappears.
Quite cool actually.
This is when you walk up to the lake.
This is how the lake looks like today