WATER & SHADOWS ............??

Before I "quiz" you - a whole hearted thank you for your comments and interest and stars and hearts with yesterdays Blip.
Today, thought should have a bit of fun...... WHERE IS THIS...??
Sorry no clue as it's too easy -
That aside - thought it a nature wonder the way the water has formed a sort of circle and the stunning sunny day throwing the shadow.

CHECK IN LARGE

Enjoy.

STOP PRES: JoanneInOz got the answer - it was from this pic taken today with the water level now normal. Check what it was like under heavy flow. This was on the 3rd July 2013.

Alphabet Day Challenge
So my day today is a "W"