Caves can be found in a variety of biomes, but they are most common in areas with karst topography. This is a landscape characterized by soluble rocks, like limestone, that are easily eroded by water, forming caves, sinkholes, and underground drainage systems.

Here are some biomes where you might find caves:

* Temperate Deciduous Forest: Caves are common in areas with limestone bedrock, often found in temperate deciduous forests.

* Tropical Rainforest: Caves can be found in areas with limestone bedrock, although they are less common than in temperate forests.

* Mediterranean Woodland and Shrubland: The limestone bedrock in this biome can also lead to the formation of caves.

* Savanna: Although less common, caves can still be found in savannas, especially in areas with limestone bedrock.

* Grassland: Similar to savannas, caves are not as prevalent in grasslands, but they can still be found in areas with karst topography.

While less common, caves can also be found in other biomes due to geological formations and erosion patterns.

Important note: Caves can also form in other types of rock, such as granite and basalt. These caves are usually formed by volcanic activity, erosion, or tectonic plate movement.