Chalybeate

Back to the same park as yesterday. The street artists have finished - see extra. For variety though, this is the wetlands walk through a spring that rises in the park.  It's brown because its iron rich - ferruginous  or chalybeate.  Tunbridge Wells has loads of these brown springs that made it famous "Wells". I liked the Wikipedia explanation of the word chalybeate so I am copying it here for your edification.

"The word "chalybeate" is derived from the Latin word for steel, "chalybs", which follows from the Greek word χάλυψ khálups. Khálups is the singular form of Khálubes or Chalybes, who were mythical people living on Mount Ida in north Asia Minor who had invented iron working."