Open to the public only one day a year, the Garden of Cosmic Speculation takes science and maths as its inspiration. Quite simply, there isn't another garden like it in the world. The garden was set up by Charles Jencks, together with his late wife Maggie Keswick and is located at Portrack House near Dumfries. That's in Scotland, by the way! It was set up in 1989 without the usual ideas people have when they create a garden. Horticultural displays very much take second place in this garden. Instead, it is designed with ideas in mind – and to provoke thought (or at least speculation) about the very nature of things.