Here is a selection of my favourites.
I know that this one was called 'Discus'.
The base of another moss-covered tree - natural art.
Protecting the Stones
A Place for Tea
The Feather - this was my favourite
The Ark of Llanwddyn - this is very poignant because the ark carries representations of the buildings from Llanwddyn, the village that was 'drowned' in the creation of the lake.
Not one of the sculptures, but the outflow of the dam, and incredibly beautiful nonetheless.
Earth Mother by a Russian artist
And this is the sculpture park from the top of the dam.
Next Powis Castle