Someone who explores caves is called a spelunker. Two spelunkers have recently discovered an unknown cavern which is part of a network of caves running about 30metres underground the burrow of Saint-Leonard (one of the suburbs in Montreal, QC).
This cavern is at least 15,000 years old, having been formed from the last ice age! This is a major discovery! The main portion of this cave network is open for tours, but this newly discovered section is not, as it is still unknown how far it goes.
If you don't like the close quarters that crawling through parts of a cave sometimes require, but you love the exploration of winding passages, then think of MeiroKodo! MeiroKodo brings you incredible mazes, secret codes, and an encrypted message that's just waiting for you to discover.