Man-made underground passage in Callanafersy West

No visible entrance, no chamber, no chamber ceiling, no floor, no door, no handle, no lamp, no light, no shadow, no depth, no distance, no width, no height, no angle, no force, no pressure, no resistance, no friction, no drag, no lift, no buoyancy, no tension, no compression, no shear, no torque, no moment, no inertia, no mass, no weight, no volume, no density, no viscosity, no elasticity, no plasticity, no brittleness, no ductility, no toughness, no hardness, no stiffness, no compliance, no damping, no resonance, no frequency, no wavelength, no amplitude, no phase, no velocity, no acceleration, no jerk, no snap, no crackle, no pop, no hiss, no hum, no buzz, no drone, no roar, no bellow, no howl, no yowl, no scream, no shriek, no wail, no moan, no groan, no grunt, no snort, no wheeze, no gasp, no pant, no breath, no cough, no sneeze, no y