Water holes are a type of natural feature found in many parts of the world. They are typically formed by the accumulation of water in underground cavities or depressions. The two crossword solutions for the term 'water holes' are wells and oases. Wells are man-made structures that are dug into the ground to access groundwater, while oases are naturally occurring bodies of water surrounded by desert or arid land. Both wells and oases provide a source of water for people and animals in areas where water is scarce.