Karst

Karst is a special kind of landform that's created by water dissolving rocks like limestone and dolomite, making lots of little holes and caves. Imagine you have a cookie with chocolate chips in it - if you lick away all the cookie dough around the chocolate chips, you're left with little holes all over the chocolate, right? Well, karst is kind of like that but with rocks instead of cookies and water instead of your tongue.

So when it rains, water falls onto the ground and some of it seeps into the soil and rocks. Over time, this water reacts chemically with certain minerals in the rocks, slowly dissolving them and creating all sorts of little underground channels and hollow spaces. Sometimes the water gets really forceful and starts carving out bigger cave systems and underground rivers!

Karst landscapes are usually characterized by big sinkholes (places where the ground just suddenly drops into the earth because there's a big hole underneath), springs (where water from underground comes up to the surface), and lots of caves! Some karst areas are really touristy because they're such cool natural wonders.

Hope that helps!