Desert Well

Desert wells are sandstone structures that generate in desert biomes.

Generation
Desert wells generate only in desert biomes. They have a $1/1000$ or $1/500$ chance to be generated in any desert chunk, which makes them a rare sight. It is possible for a well to generate around a cactus. The well structure will still generate with the "Generate Structures" option disabled.

$$ desert well has a chance to generate in cluster between 16 block.

Desert well generation is capped at the coordinate Y-128. If desert terrain is extended higher than Y-128 (via add-on), no desert well will be generated. In the newest version of Minecraft they will can lead you to treasure if you follow them.

Structure
Desert wells are built of sandstone blocks and slabs with a water source inside.