A river in Spain turned bright green, forcing authorities to reassure residents the waters had not been contaminated. This was reported by Mirror.
The extraordinarily hue evoked memories of the way the Chicago River in the USA is deliberately turbed green every year for St Patrick's Day.
The river began to change color at its source in Andorra before spreading downstream to to the Catalonia region of Spain on Thursday.
Seu d’Urgell mayor Albert Batalla said the coloring was “entirely harmless, non-toxic and biodegradable” and had been intentional.
The Andorran Ministry of Health said the harmless dye was used to help identify the source of possible contamination and would have no environmental impact.
"It is an action that has no impact beyond the visual," the government said.
It added the substance was harmless to both people and the natural environment and would dissolve within a few hours.
Earlier it was reported that Spain supports immediate granting of visa-free regime for Ukrainians, according to Prime Minister Rajoy. Spain also supports the early conclusion of the ratification process of the Association Agreement between Ukraine and the EU.