The mysterious moving stones of the packed-mud desert of Death Valley.
Basalt also forms different but equally fascinating ways when eruptions are exposed to air or water.
Blue holes are giant and sudden drops in underwater elevation.
Red tides are sudden influxes of massive amounts of colored single-cell algae.
Many see these apparently perfect ice circles as worthy of conspiracy theorizing.
Mammatus clouds are often harbingers of a coming storm or other extreme weather system.
A rare confluence of right time and right place for the sun and certain clouds.
Sinkholes are one of the world's scariest natural phenomena.
Penitentes are dazzling naturally-forming ice blades.
Ever wonder the truth about UFOs?
Light pillars appear as eerily upright luminous columns in the sky.
Sundogs are the product of light passing through crystals.
Fire whirls appear in or around raging fires
Beautiful orange moon hanging low in the sky.