The Underground Lake at Opera Garnier: Real History & Phantom Mythology
The Underground Lake at Opera Garnier: Real History & Phantom Mythology (2026) Yes — the underground lake at Opera Garnier is real. It is a large artificial reservoir beneath the building, created during construction (1861–1875) when engineers pumped out groundwater from the marshy subsoil and then lined the excavated cavity to retain water as a … Read more