Field Notes: November 12, 2025 Location: The Whispering Grotto, subterranean riverbed Encounter Summary: Deep within the damp acoustical chambers of the cave, I stumbled upon a vibrant cluster of violet formations wedged into the basalt. This was the charming but reclusive `Geodus verecundus`, affectionately nicknamed the "Amethyst Siren" by regional guides. Unlike aggressive mimics, this gentle entity creates a permanent, hard carapace of bio-crystalline structures that resemble high-quality am

Samahan si Biyahero Drew sa pagdiskubre ng Duba Cave at ang kahanga-hangang underground river dito. Tampok dito ang malamig na tubig, natural rock formations, at ang thrilling na cave exploration na patok sa mga adventure seekers. Tara na't tingnan kung bakit dinarayo ng marami ang natural wonder na ito! Panoorin ang video. #BiyaheNiDrew | GMA Public Affairs