limestone pillars
- stalactitesMineral deposits hanging downward
- stalagmitesUpward-growing cave formations
- karstEroded soluble rock terrain
- cavesNatural underground chambers
- columnsUpright structural shafts
formations · erosion · calcite · spires · underground · dripping · ancient · towering · cathedral · mineral · sedimentary · weathered · pinnacles · geology · dissolved · white · jagged · monoliths
formation direction/type
limestone pillarslimestone caverns
Natural caves in calcium carbonate rock
sinkholes · limestone caves · cenotes · caverns · underground rivers