Many thanks to Baz for hosting this week despite being unwell. A really good theme, and one that everyone should have photos for, so NO excuses for not posting!!
1) Montezuma's Well, Arizona. This is a natural limestone sinkhole fed by an underground spring. It maintains an almost constant level of water even in times of drought. The water is highly carbonated and has high levels of arsenic. Despite this, five unique species live here that are not found anywhere else.
3) Raindrops suspended on a spider-web.
4) Cleddau River sunset, Milford Haven, Wales.