Spelunker

A spelunker is someone who explores caves, often as a hobby or for scientific purposes. This activity involves navigating through underground environments, which can include complex passageways, unique rock formations, and various ecosystems. Spelunkers may study cave geology, biology, and hydrology, or simply enjoy the adventure and beauty of these natural wonders. The term is often used interchangeably with "caver"; however, "spelunker" typically refers to those who explore caves more casually, while "caver" can imply a more serious or technical approach to the activity.