If you play with Adobe Camera RAW a bit, you can make every photo look like this. The two most important steps are: 1. Move white balance from green towards magenta 2. Move blue tones from green towards purple
This was taken during twilight so it had a nice purple tint. Increased the effect as well by slightly decreasing the white balance toward a cooler temperature : )
1. Move white balance from green towards magenta
2. Move blue tones from green towards purple