Unusual Sounds

Unusual sounds detected worldwide have fueled Hollow Earth theories for centuries. Mysterious underground booms, like the "Bristol Hum" or Alaska's "Seneca Guns," lack conventional explanations. Some researchers propose these vibrations originate from massive subterranean cavities or tunnels. Reports of ocean sounds flowing upward through wells and strange echoes in deep caves suggest hollow spaces beneath Earth's crust. While mainstream science attributes most to seismic activity or methane explosions, conspiracy theorists argue the consistency and musical quality of these sounds hint at an inner world with its own ecosystems and potentially, civilizations.