I love fantasy scenes and architecture, so this caught my eye immediately when I saw it.
It is not easy to create truly original scenes in a fantasy world, but I'd say you did a really good job. The city you depict here is nice, and the ancient Greek and baroque architecture are combined in a seamless way, complementing each other nicely. I love the idea of waterfalls falling from the building and drawing a curtain of water in front of the lower levels, though I have trouble identifying where does the water jets originate from... they just seem to come from the glass windows, or downright from nowhere. You should have added some pipes or openings in the wall.
I feel you have some minor problems with the lighting, apparent on the greenery (compared to the walls), and on the water jets (the right ones, and especially the lower parts, should be in more shadow), but this does not detract much from the scene.
Overall, I must say I really love this image, and it is certainly a place I would like to visit if it existed.