Caves of Glass is a documentary from director Sid Perou's Realm of Darkness series, focusing on the ice caves of the Austrian Tennengebirge Alps, including the Eisriesenweld and Eiskogelhöhle. It features Austrian speleologist Fritz Oedl, Belgian speleologist Guy Meauxsoone, and Ian "Tommo" White of the Northern Caving Community. First broadcast on Channel 4 on February 15, 1986, it won a Special Mention at the 5th Barcelona International Festival of Esoteric Cinema that same year.
Is Realm of Darkness - Caves of Glass on Netflix? Unfortunately the movie Realm of Darkness - Caves of Glass is not yet available on Netflix.
| Directing | Sid Perou | Director |
| Writing | Sid Perou | Writer |
| Crew | Simon Wells | Script |
| Sound | Ernie Wood | Music |
| Editing | Sarah Flint | Editor |
| Editing | David Lawrence | Editor |
| Sound | Ian "Tommo" White | Sound |
| Sound | Mark Stokes | Sound |
| Crew | Sid Perou | Cinematography |
| Crew | Guy Meauxsoone | Cinematography |
| Art | Leslie Rogalski | Opening Title Sequence |
