Escazú, Costa Rica: Photos of Iridescent Cloud Formation Over Central American City Posted Online
The clouds were also visible in other parts of the country, including parts of the capital San Jose. The phenomenon is caused by light being refracted by water in the clouds, experts say.
http://abcnews.go.com/US/mysterious-iridescent-end-times-cloud-phenomenon-spotted-costa/story?id=33834206&override=facebook
