You may get .psd* file of "Fantastic Water Landscape" Photoshop tutorial by making a donation. Put the tutorial title in "Add special instructions to seller" line of PayPal and it will be sent to you shortly.
The picture before and after editing (Click to enlarge the picture):
- Open castle or palace image in Photoshop.
- Right click on layer in layer palette, choose Layer From Background.
- Add Vector Mask.
- Remove superfluous areas using Vector mask and smooth black brush.
- Adjust colors, brightness and contrast (Image > Adjustments). Make colors colder.
- Create sky background for collage, just like in example here.
- Make more contrast colors transitions. Image > Adjustments > Curves.
- Load selection for Sky reflection layer.
- Create a new layer (Opacity 25-30%) and fill selection with white/transparent linear gradient.
- Create Rectangular using Rectangular Marquee Tool in a new layer.
- Fill it with light blue color.
- Go to Filter > Blur > Gaussian Blur (30)
- Transform rectangular on vertical.