Cave system is a network of connected underground caves and passages. These spaces can include tunnels, chambers, and openings that link together. Some cave systems are very large and extend for many kilometers. They may have features such as rock formations, underground rivers, and hidden pathways.

Cave systems are found in many regions, especially in areas with limestone rock. They form over long periods as water moves through and shapes the rock. These systems can exist deep below the surface.

Cave systems are used by animals such as bats and insects, and sometimes explored by humans. Some are studied by scientists or visited as natural sites. They are part of underground environments and ecosystems.