Here's why:

* Solubility: Limestone and dolomite are composed primarily of calcium carbonate (CaCO3). This mineral is soluble in slightly acidic water, which is often found in nature due to the presence of dissolved carbon dioxide.

* Dissolution and Erosion: When acidic rainwater percolates through limestone, it slowly dissolves the rock, creating cracks, fissures, and caves. This process of dissolution and erosion is what gives karst landscapes their characteristic features.

* Other Features: Other features common in karst landscapes, such as sinkholes, disappearing streams, and underground rivers, are all a result of the dissolution of limestone.

While limestone is the most common rock type associated with karst landscapes, other carbonate rocks like dolomite can also be found in these environments.