The castle is famous for it's architectural mix of Gothic and Rennaisance styles that have been applied after a big fire in 1654. Today, the Audiobomber walks the haunted hallways and moats, rattling his chains (analog anbd digital) and deliberately wetting his ghostly sheets.
HDRI ("high dynamic range image") is a special photographic technique. The photographer usually takes a serious of shots with varying aperture/exposure settings. These images are then blended together by special software, resulting in a widley increased dynamic exposure range, giving the images an often supernatural and sometimes gloomy appearance.