A pool of bright pink water and an expanse of liquid so toxic it burns the flesh are among the most unusual lakes in the world.
As anyone who has been following the Surfers Against Sewage campaign knows, the UK's bodies of natural water are not ideal for swimming in - in no small part due to the huge amount of effluent utilities companies dump into them.
One small reason to be cheerful is the knowledge that at least they're not actively toxic and filled with a chemical once used to petrified the flesh of ancient Egyptian kings.
