I have to concur with the folks that love the composition. It's a really nice original attempt at a well-worn subject, and the color and contrast work nicely to bring the viewer around the arch and back to the cathedral in the center. Check it out.... It's also aided by the fact that the darkness in the center left (at the focus of the spiral) gives a weight that contrasts with the very light background behind the main part of the rock arch to the right. Really really well done IMHO.