cataphile

noun2

1. •
   A type of urban explorer who visits the ancient catacombs and quarries linked by tunnels beneath Paris, France.

   • Notre Dame de dessous la terre [artwork by Damien Jacob, text by Jean-Pierre Pécau, 2001]: […] The artist is a former cataphile, and the series is replete with subterranean history and folklore. — 2005
2. •
   An individual who explores subterranean catacombs, mines, or quarries.