The deepest caves on Earth are still being studied by scientists. They are unique environments created over millions of years of geological processes. They usually occur in areas rich in limestone rocks where water slowly erodes rocks to create vertical pits and horizontal tunnels. It takes a lot of time, but the result is a network of passages that is not fully mapped yet. Most of these caves are not completely explored because of their depths and tight spaces.The list of the deepest caves changes as new surveys refine measurements. Some systems extend beyond two kilometres vertically, placing them among the most extreme geological formations known. The following overview presents currently recorded depths and key geological features based on available exploration data. According to the WorldAtlas data, the top 10 world’s deepest caves are listed below, and know what lies beneath them.
List of the deepest caves in the world
World’s deepest caves
Veryovkina Cave
Veryovkina Cave is recorded as the deepest known cave at 2212 metres in the Arabika Massif of Abkhazia. It is formed in limestone karst where water erosion has created vertical shafts and long galleries. First explored in 1968, full depth was confirmed much later. The system includes floods, tight passages, and deep pits, making exploration highly difficult. Parts remain unmapped due to unstable conditions and water flow variations.
Krubera-Voronja Cave
Krubera-Voronja Cave reaches 2199 metres and lies close to Veryovkina in Abkhazia. It features branching passages and deep water-filled sumps requiring diving equipment. Erosion from underground rivers shaped its vertical structure. Exploration is limited by hypothermia risks, flooding and seasonal access problems. Several branches extend beyond 1300 metres depth, creating complex navigation challenges for speleologists working in extreme conditions underground.
Sarma Cave
Sarma Cave also in the Arabika Massif reaches 1830 metres in depth. It is known for wide chambers and narrow connecting tunnels. Water inflow can rise rapidly during heavy rainfall, affecting access. Geological surveys suggest additional undiscovered passages may exist below current mapped levels. The cave remains partially unexplored due to unstable hydrological conditions and difficult terrain.
Snezhnaja Cave
Snezhnaja Cave spans 1760 metres in depth and contains large chambers, including Throne Hall and Hall X. It features multiple erosion layers indicating different geological periods. The cave was first explored in the late 1960s, with full depth confirmed in the 1990s. Complex siphons and large speleothems make navigation difficult and require technical equipment for safe passage.
Lamprechtsofen
Lamprechtsofen in Austria reaches a depth of 1735 metres and extends over long mapped passages. It is associated with historical legends of hidden treasure and early exploration attempts dating back centuries. The cave contains waterfalls, dripstone formations, and large chambers. Modern surveys have expanded their known length significantly. Access is partially open to visitors in designated sections only.
Gouffre Mirolda
Gouffre Mirolda in the French Alps reaches 1733 metres depth. It was fully measured in the early 2000s after decades of exploration. The system includes siphons, fossil galleries and branching passages formed by ancient drainage activity. Stalactites and mineral deposits are present throughout. Access conditions vary with seasonal water levels affecting safe entry points. Some sections remain unexplored due to instability underground.
Gouffre Jean-Bernard
Gouffre Jean-Bernard is located in the French Alps and reaches 1617 metres depth. It consists of interconnected shafts and galleries formed in Jurassic limestone. First explored in the 1960s, it later became one of the deepest known systems. The cave is named after two explorers linked to its history. Water flow continues to shape internal passages.
Sistema del Cerro del Cuevón
Sistema del Cerro del Cuevón in Spain reaches 1589 metres depth in the Picos de Europa region. It includes multiple entrances and long vertical drops. Exploration required extended expedition efforts with large teams assisting descent and ascent operations. The system was fully reached in 1998. Research has also examined gas emissions within the cave system.
Hirlatzhöhle
Hirlatzhöhle in Austria reaches a depth of 1560 metres and extends over 70 miles in length. It contains multiple entrances, some requiring diving access. The cave includes large vertical shafts and unstable rock formations. Exploration is ongoing due to complex passages and barriers such as the Dark Star vent. One fatal incident has been recorded during expedition work.
Sistema Huautla
Sistema Huautla in Mexico is the deepest cave system in the Western Hemisphere at 1560 metres depth. It formed in limestone through long-term water erosion. The system contains interconnected tunnels, chambers, and sumps. First explored in 1965, deeper sections were reached in later expeditions using advanced diving equipment. The cave holds cultural significance for local Mazatec communities.
