The Waterfalls walk in Ystradfellte, South Wales, is spectacular this time of year. There has not been much rainfall lately so the there is not a great deal of water tumbling over the falls, but the autumn leaf fall and light coupled with the growth of moss on the stones more than makes up for this.
More pohotographs of the Ystradfellte waterfalls can be seen here http://www.h2ophotography.com/river-mellte
The River Within - Thames source to sea
Follow my photographic exploration of the Thames from source to sea from a kayak