Laurel Caverns
Videos
Laurel Caverns is the largest cave in the Commonwealth of Pennsylvania by volume and area. Located in the community of Farmington, it sits on the Chestnut Ridge near Uniontown, roughly 50 miles southe
Stairs, lit with electric lights, lead into the cavern.
Passageway in Laurel Caverns
Optical illusion
Videos
In visual perception, an optical illusion is an illusion caused by the visual system and characterized by a visual percept that arguably appears to differ from reality. Illusions come in a wide variet
"The Organ Player" – Pareidolia phenomenon in Neptune's Grotto stalactite cave (Alghero, Sardinia)
Rabbit–duck illusion
Disparity illusion
Midsagittal-strip illusion. In 3D plane CD is seen, AB is not.