it is a person who explores caves.
+++
Not according to most such people.
I've no idea where the word originated [but now see below] - USA slang yes, but how, when & why I do not know. No American caving literature I've ever read, uses the word. The proper, international, term in the English language is "caver". Simple as that.
!!!
Since writing that below my '+++' answer-partition I learnt that "spelunker" was a rather pretentious but harmless invention by two American cavers in the 1930s. It was used for a while quite innocently and picked up the Press and non-caving public. Eventually the word became one of derision among cavers themselves for novices and dilettantes, and so faded away from caving publications; but this development was not realised by non-cavers.
There is a fancy word, Speleologist - this describes a caver who studies scientifically the caves themselves (geology etc) and their contents (wildlife etc.). The first e should really be the ae dipthong character, but it is usually now emasculated to just e. Notably perhaps, one of the world's leading speleology learned-journals is called simply Cave and Karst Science.
spelunkers, speleologist
caves
The cast of Spelunkers - 2002 includes: Jan Paulo Sebastian Schnoy
a wrench
Spelunkers
Because they think it's fun.
Because they think it's fun.
cause its a paradise
People who search caves are commonly referred to as spelunkers or cavers. They are individuals who explore caves for either recreational purposes or scientific research.
Spelunkers like to explore caves.
Go to a store called Spelunkers, go downstairs and you are there.
Usually by word of mouth.. but if they do have to become separated.. they use advanced Walkie Talkies.