Best known for its stunning display of vivid color, Yellowstone National Park is an undoubted national treasure. The reds, yellows and browns of the mud in the images below are derived from oxidation states of the iron in the mud.


Best known for its stunning display of vivid color, Yellowstone National Park is an undoubted national treasure. The reds, yellows and browns of the mud in the images below are derived from oxidation states of the iron in the mud.
The Windsor Bridge or Windsor Town Bridge, an iron and granite arch bridge over the River Thames, is located between the towns of Windsor and Eton in the English county of Berkshire.