Charles Jencks' Garden of Cosmic Speculation at Portrack House, near Dumfries in South West Scotland.
This is cross-view stereopair. To view this image in 3D you need to cross your eyes until you see three fuzzy images. Then try and focus the middle image. This takes a lot of patience to get right, but once you've done it once it gets easier.
There is an anaglyph version for red cyan 3D glasses here: