I’m not a big fan of parallax web sites, mainly because it’s being overused without much point and it is usually not well implemented, resulting in slow-loading websites. Once in a while though, you get a website where the parallax effect is actually part of the concept of the website.
Booking.com has an excellent new campaign in time for halloween showcasing their choice of “haunted hotels” that you can actually book via the service.
Try it out! :)