Conch Bar Caves on Middle Caicos is the largest non-submerged cave system in the Bahamas-Turks and Caicos island chain and a Turks and Caicos national park. The cave system was named after the nearby village of Conch Bar. Conch Bar Caves is a Karst limestone cave system formed over extremely long periods of time by the dissolution of soft limestone by mildly acidic water containing carbonic acid. The cave system is a live cave system and is considered mid-sized on a global scale. Conch Bar Caves contains many of the common cave features found in other regions, such as stalactites, stalagmites, and columns, as well as pools that change with the tide. Guano (bat manure) mining began in the 1880s, which is when the cave’s recorded history began.