Watch: Rare mysterious 'rainbow cloud' formation appears over Costa Rica!

Costa Rica: To the delight and surprise of residents and tourists in Costa Rica , a so-called rainbow cloud formed over the skies leaving them in awe.

This rainbow cloud phenomenon, known scientifically as cloud iridescence was caught on camera and has caused an online sensation.

This rare event occurs when water droplets or ice crystals in the atmosphere scatter the light, according to the Weather Channel.

The beautiful natural occurrence captured by some eyewitnesses is being touted as "the end of days" and a "sign of God"

The video was uploaded to YouTube by Jessie Montealegre.

Video courtesy: Jessielou121/YouTube